Meh, you can be plenty reckless when you're old as well. There's always parties. I wish I had realized this when I was younger. It would have made me feel a lot less angsty about "wasting the best years on my life" on coding (which I really enjoyed) instead of spending my youth on parties.
Also; saying "don't overwork yourself" doesn't really work. It's better to let a person overwork themselves and learn the lesson the hard way. People told me that over and over but I never actually took it to heart until I actually did it.