If you've ever avoided something you should be doing, you'll enjoy David's new thoughts about productive procrastination. It's a less-than-two-minute read. Then you can get back to what you should be doing. Or not!
I have observed the same in my own life. Sometimes I procrastinate on some projects and actions for weeks. I know I should be doing them but for some reason I cannot get myself engaged. Only to find out in a few weeks that something has changed and the original project is no longer relevant or need some major re-clarification.
There is a book about the same phenomenon - Clarity by Jamie Smart.