I finally started reading Shape up. I'm only a quarter of the way in, but I'm already drowning in notes.
Here's one that resonated with me, because I find myself sometimes confusing the problems I think I have for the problems I actually have.
When facing a potential problem, try to reframe it in terms of the constraints it presents, your limitations on what you can do, the risks you're taking, and the potential rabbit holes you're getting yourself into. This will help you specify the problem in a way that you can actually solve it (or decide you can't).