Tim Ferriss

Ferriss said he tries to invest in products he personally uses every day rather than following elaborate theses.

“i just try to invest in stuff that i will use every day”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 1:47:49

Ferriss said the main lesson from his 20-year investing retrospective is to let winners run as long as possible.

“the takeaway is you've got to let your winners run as long as possible”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 1:45:20

Ferriss recommended asking an LLM open-ended personal questions, such as what to pursue over the next five years, and said the answers were outstanding.

“when you ask it open-ended personal questions in the way that you would ask a close friend, what do you think are three to five creative ways I might explore things professionally in the next five years?”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 1:15:58

Ferriss said he values investing as an objective scorecard of his own thinking rather than as accumulation.

“What's fun about investing to me is it's a way to scorecard your thinking and decision-making”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 1:09:33

Ferriss reported that his all-format book sales have declined sharply in successive years since ChatGPT's release.

“you see a slip by negative 5%. Then you see a slip by like, I'm making up these numbers, but they're close, negative 28%. Then it's like negative 49%”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 1:52:19

Ferriss said seeing LLMs produce in 30 seconds what would take him 30 hours drains his motivation to write.

“what they can do in 30 seconds is what would take me 30 hours and I'm just like fuck It really drains the motivation for me to put in those 30 hours”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 1:12:12

Ferriss argued AI's main effect so far has been limited because most tasks being automated were not worth doing.

“I would say that the honest answer is not that much because most shit isn't worth doing in the first place”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 1:10:32

Ferriss said training merely to avoid dying is not motivating for him and he prefers goals with deadlines.

“training to not die sooner than is necessary is not sufficient for me i'm just like that's such a depressing un-invigorating goal”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 28:39

Ferriss said seeing climbers in their 60s and 70s at gyms, rather than teenage prodigies, inspired him to take climbing seriously.

“It was the people in their 60s and 70s who were climbing every day that inspired me to want to take this more seriously”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 34:53

Ferriss said his current physical goal is multi-pitch climbing in Yosemite, enabled by a surgically repaired elbow.

“I was always for at least the last 15 years limited by my right elbow, which I had surgically repaired. So it's ready to go. And I want to do some multi-pitch stuff in Yosemite”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 27:36

Ferriss says he now prefers interventions with decades of safety data over novel treatments such as overseas gene therapy.

“And if I can pick something that has... 50 or 100 years of research where i know with some certainty what the adverse events are and the probability of those adverse events versus the latest and greatest thing”

The Tim Ferriss Show: #876: Dr. Andrew Huberman — Peptides, Performance, and Protocols (Jul 22, 2026) · Listen from 1:43:27

Ferriss argues that the lack of reported adverse events from gray-market peptides reflects the absence of reporting mechanisms rather than safety.

“this absence of evidence does not equal evidence of absence”

The Tim Ferriss Show: #876: Dr. Andrew Huberman — Peptides, Performance, and Protocols (Jul 22, 2026) · Listen from 1:37:35

Ferriss raised the ethical problem of administering hallucinogens to people who cannot give consent.

“What is ethical to use as treatment in someone who cannot give consent?”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 59:13

Ferriss reported that relatives with dementia given exogenous ketones became markedly more verbally fluent within about twenty minutes.

“I've given it to relatives with dementia and within 20 minutes, their sentences have like five X in length and they're more acute verbally”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 45:42

Ferriss notes a business version of the reframe, attributed to Andy Grove, of asking whether a company would enter its current line of business afresh.

“if we were not already in this line of business, how much would we pay to pursue it or would we pursue it in the first place”

The Tim Ferriss Show: #885: How to Simplify Your Life — Tips from Oliver Burkeman, Chip Conley, Elizabeth Gilbert, and More (Oct 2, 2026) · Listen from 19:20

Ferriss argues that bundling psychotherapy with MDMA, as Lykos did, hurt approval because the FDA could not evaluate standardized psychotherapy.

“the combining of psychotherapy right the bundling of psychotherapy and then you put it in front of the fda advisory committee”

The Tim Ferriss Show: #884: How to Spot 10-Year Trends and Build Billion-Dollar Companies — Kevin Ryan of DoubleClick, MongoDB, Business Insider, and Many More (Sep 24, 2026) · Listen from 57:21

Tim Ferriss challenges listeners to reconsider their excuses after hearing Miller's story.

“what bullshit excuses do you have for not going after whatever it is that you want?”

The Tim Ferriss Show: #881: Tales of Overcoming The Odds, and How to Turn Losses Into Wins — Tim McGraw, Terry Crews, Dax Shepard, and More (Sep 4, 2026) · Listen from 4:26

Ferriss says part of him believes he is shortchanging himself by using perfectionism to avoid writing, since writing helps one think.

“the writing helps you to learn to think, as Kevin Kelly, to invoke that name again. He writes to think”

The Tim Ferriss Show: #878: How to Start When You're Stuck, Finish What You Begin, and Stop Waiting for Inspiration — Creative Advice from Elizabeth Gilbert, Seth Godin, Joyce Carol Oates, Anne Lamott and More (Aug 5, 2026) · Listen from 51:15

Ferriss says a sloppy stem cell injection damaged the fat pad in his knee and left him with residual pain a year or two later.

“injected my fat pad in the knee and made a bunch of structural damage. And my knee was fucked. And still, this is a year or two later, have residual pain in my knee”

The Tim Ferriss Show: #876: Dr. Andrew Huberman — Peptides, Performance, and Protocols (Jul 22, 2026) · Listen from 1:44:54

Ferriss argues psychedelics are not a panacea and compares them to reconstructive surgery requiring extensive rehabilitation.

“The way I think about it now is it's like very complicated knee reconstructive surgery”

The Tim Ferriss Show: #876: Dr. Andrew Huberman — Peptides, Performance, and Protocols (Jul 22, 2026) · Listen from 52:21

Ferriss says a one-day accelerated TMS protocol preloaded with d-cycloserine reduced his generalized anxiety disorder and OCD symptoms by 90 percent for three to four months at a time.

“I've been able to get a 90% reduction in my generalized anxiety disorder and OCD for three to four months at a time”

The Tim Ferriss Show: #876: Dr. Andrew Huberman — Peptides, Performance, and Protocols (Jul 22, 2026) · Listen from 53:17

Ferriss argues that inducing plasticity does not guarantee improvement and that the two to three weeks following a psychedelic session are the critical reformatting window.

“But the two to three weeks following has always been viewed as this golden window for reformatting your behavior and your patterns”

The Tim Ferriss Show: #876: Dr. Andrew Huberman — Peptides, Performance, and Protocols (Jul 22, 2026) · Listen from 49:11

Ferriss said the MM120 trial showed dose-dependent improvement in anxiety scores with 100 micrograms appearing to be the minimum effective dose.

“it seems like at least according to the data in this study, the minimum effective dose would be 100 micrograms”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 55:31

Ferriss said data suggest five to six months of thrice-weekly Norwegian 4x4 training produces brain volume changes lasting up to five years.

“if you do five to six months of gutting it out three times a week, the results... Holy shit. The dividends pay off for, it seems, up to or possibly beyond five years”

The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 50:50