Thank you all for the answers so far, the only one I'd disagree with would have to be, respectfully, the politics. I kind of believe over-involvement in politics by youth is a major contributing factor in some of the messes we've found ourselves in.
Let's be honest, one of the default principals of BEING young is an inherent lack of life experience and a generally idealistic, overly optimistic, and emotional approach to thought and decision making processes. That's a wonderful mindset to have, and one I sometimes miss dearly, but it's also a dangerous way to go about making decisions which impact society en masse.
Just my two cents, but I tend to believe youth should be spending their time trying to figure out their OWN lives, save the politics for later on when you have a little more experience to base your stance on... a "leg to stand on", as it were.