My favorite insight from him, though, is from a recent tweet:

Here's why it is all true.

Eight killer habits

Drink more water/eat more vegetables and greens Water replenishes your body as well as your brain, both of which are made up mostly of liquid. This habit is even more crucial for coffee drinkers. And, of course, veggies and greens are proven to strengthen our immune system and general health.

Get 8 hours of sleep TED speaker Matthew Walker says missing sleep is actually shortening our lives. Eight hours may not be realistic because of startup commitments, a young family, and other reasons, but it is worth finding ways to increase the sleep you do get by napping and decreasing media consumption, among other approaches.

Walk outside in the sun Studies show that our minds become stronger after walks, particularly walks in nature. It's no wonder that Steve Jobs and other luminaries made walks-and-talks their default meeting room.

Leave your phone on silent Notifications and phone calls pull you out of the moment, whether you are taking time to think or doing some deep work. Detox yourself to raise your concentration and focus.

Read a few pages each day To paraphrase Jay-Z, you can get a million dollars worth of game for $9.99. Seriously, how else can you learn how Warren Buffett invests, Bill Gates leads, or the late Steve Jobs founded in such an easy manner?

Don't hang out with toxic people The late Jim Rohn is credited with saying you are the average of the five people you see the most. Invest in having a brain trust, a carefully curated group of mutual supporters who will keep you strong and positive.

Work on projects you care about As I say in my new book, Bring Your Worth, you get energy from dedicating yourself to the very thing you care about the most. It can be a side hustle or a full-blown startup. The most important thing you can do is start.