Take a look at a few helpful guides I've picked up along the way:
1) Unable to choose a specific job? Choose a direction of interest instead.
2) If you think you'll look back 5 years from now and be proud of your decision - go for it.
3) Devote time to doing what excites you.
4) Think about where and when you have experienced "flow" a state of heightened focus and immersion in activities such as art, play and work; make it a point to continue these activities.
5) Believe in your inner dream.