A couple years back, I went to my high school's graduation. The valedictorian's speech was the greatest thing I've ever heard. He started and ended with this phrase:
"I am only certain of one thing.....WE'RE ALL GOING TO DIE!"
We are all wanting to achieve such great things, but with such big ambitions we can not be waiting until our 30's to start working towards getting the things we want. Don't blow your sweet spot of learning in your 20's.