Dream small dreams. If you make them too big you get overwhelmed and you don't do anything. If you make small goals and accomplish them it gives you the confidence to go on to higher goals.
I've been asked to do a retrospective since I was about 28 and I always thought that was a bit odd. It's great to look forward as an artist because in the future the possibilities are infinite you look back and it's all fixed so it's a scary thing.