I try not to be too optimistic or pessimistic. If you're a pessimist then that's depressing all the time; if you're an optimist and things don't work out then that's depressing, too. ↗
The only thing that really matters in the initial part of my career, the worst mistake I've ever made was try to do things to please the audience thinking how the audience is going to respond if I do this. ↗