Whatever excites you, do it. Whatever drains you, stop doing it. For example, many musicians get into music because they love playing their instruments. They love it so much they want to do it full-time.

Your instincts have a compass that points in two directions. What excites you? What drains you? No matter what advice anyone gives you, no matter how smart they may be, you need to let this compass guide you.

If it doesn't excite you, don't do it. There's almost nothing that you must do. Whatever you hate doing, someone out there loves doing it. So if it's necessary, find them and let them do it. Work toward this ideal and soon you'll be doing only what excites you the most.