Andrew Crow at Adaptive Path has Some Good Advice.
It’s all my fault. Blame no-one, but your self, if you have touched something accept total responsibility for that piece of work. If you accept responsibility you are in the position to do something about it.
Draw with different pen. Magic markers and Pentels are not the only ways to make marks on paper. Change your tools, it may free your thinking.
I'd never really thought about it before, but when I want to start something new, or make a dramatic change on a product, I often change pens. I find using a new pen helps me shed the old ideas, and look at a project with a fresh perspective.