I just finished watching this documentary and thought it made some very valid/interesting arguments. The movie features commentary from people like Dave Mathews, Calexico, Eric Clapton, Elvis Costello, Erykah Badu (prob the most intriguing to watch ), The Roots, and My Morning Jacket. Check it out if you have some time to kill.
If you're a busy bee just watch 1:18:00 - 1:20:00. Valuable advice that could be applied to any career/hobby/lifestyle.