Peter Norvig and Joseph Campbell
I had lunch with Peter Norvig about 18 months ago - yes, as you would imagine, he is a very cool guy - lots of fun to talk with. I just saw a link to his article "Teach Yourself to Program in 10 Years" and re-read it.
I think that his comments go way beyond programming. They remind me a lot of Joseph Campbell's advice "follow your bliss": do those things in life that you most love to do.
While I make my living designing and writing Java software, I invest a huge amount of time studying other programming languages; just in the last few years I have:
Studied Paul Graham's great Common Lisp books - I wrote 2 Lisp books for Springer-Verlag many years ago, but I was rusty...
Studied Mark Pilgrim's excellent "Dive into Python" to brush up on my Python skills
Learned Ruby (see my open source Ruby NLP projects on my main web site)
Brushed up on my Prolog skills by working through Sterling and Shapiro's "The Art of Prolog" - I used to be a Prolog guru, and I wanted to get some of my edge back
I also spend a minimum of 5 hours non-work time a week learning new Java frameworks, reading other people's Java code, articles, etc.
How do I get time for this and still have a great life? I suggest not watching TV :-)
When I talk to teenagers, I like to encourage them to follow career paths that involve doing things that they love doing - don't just try to make a lot of money.