If you can learn to accept the worst possible things that can happen in life, it tends to free you from worrying about everything else.
Unlike life, acting requires no social conditioning. I feel free to let my character do whatever it has to do. Besides. I never think of them as negative, they all have their own worthwhile motives.
If you can't do the business side, you can't do your art. People have all these misconceptions -- that it's all about connections or luck or looks. No, you have to make it happen for yourself. The window of opportunity isn't very big; you have to get through it before it closes.