+1 for this! Here were some of the concepts from Tim's interviews that I still think about:
1. Meditation comes up in a lot of the podcasts as a performance practice (as opposed to spiritual practice). It's good to hear that reinforced by a lot of successful people.
2. I use a technique from the Josh Waitzkin episode about priming your brain with hard problems to work on while you sleep. You finish your work day with your most intractable problem. That primes your subconscious to think about it overnight (assuming your evening isn't very taxing). Then I journal in the morning to see if I've had any insights. I often find the intractable part was emotional and whatever happens in my brain while I sleep helps me figure that part out.
3. I like the Pavel episode (the Russian strength coach) for reminding me that a lot of strength training is neurological and that not every workout needs to be done to exhaustion. His Russian athletes had a thing they called Grease the Groove, which was essentially to do lots of short sets spread throughout the day. That basically saved my strength work because weights are the part I'm most likely to skip at the gym for time.
4. There's a segment in the Tony Robbins episode where he denies being a motivational speaker. Essentially he thinks he's a strategist that also happens to care about sequencing and packaging his strategy advice in a way that people can hear it. I think that concept comes up all the time at work: it's not enough to be right, people also need to hear you.