15. I'm constantly pushing myself into discomfort. Doing things that challenge and push me to become a better version of myself is crucial to maintaining a youthful outlook. The ability to learn new things and upgrade ourselves physically and mentally is an infinite game I'll gladly play for the rest of my life.

"The key is to enjoy hanging out on the edge. That is, you find it interesting to attempt things one step beyond where you are right now. It could be the edge of your ability or the edge of your knowledge or the edge of your network.

If you reach — but just a little — and you do it every week, then you'll take on challenges that are manageable enou... See more