You have something important to do, and you're anxious about it. Not only do you want things to go as planned, you NEED them to go as planned. Everything has to be perfect and so you spend an obsessive amount of time mapping out the variables and possible outcomes. Then, before you know it, 3 hours have gone by and you haven't even started.

Sound familiar? I thought so! Whether you know it (or acknowledge it) or not, the pursuit of perfection just forced you to procrastinate. Next time just do the thing!