This essay really gets better with age. When I first read it I was a kid who thought the advice was pointless -- I already spent all my time thinking about physics problems, what else was there to do? But focus on the good stuff got harder with age.
Absolutely. For me it’s because of two reasons. When you’re young, you feel like you have unlimited time. When you’re old you know that's not so true anymore. Also, when you’re young you have much more time at your disposal. The older you get, the more your job and your family will take a toll on your time, until you realize one day that the only time you have for yourself is when you take a shower.
