"You must have long range goals to keep you from being frustrated by short range failures."- Charles C. Noble 5

This is excellent advice. In life, you need to have an agenda. Broadly, what is it that you want to accomplish? How do you want to contribute to society. You can't plan every step because the future is the big unknown. Disappointment will rear it's ugly head and perfectly made plans will have to be altered and changed. Always look at the big picture and don't let little disappointments frustrate you. Live life to it's fullest. At the end of the day, you want to look back and say no regrets.