Going all the way for your dream (or something you believe in); it doesn't matter how many times you fail, and only you should be responsible to decide when to let it go when you think it's time to move on. Doing what you want, for as long as you want, is what life is all about.
Only one or maybe two things are really important at any point in your life, rest of them just seem important, but they are not.
Boredom is the biggest problem of our generation.