Last week I was stuck on a problem and unsure what the next step was. It can be hardest for me to get started on a task when I don't even know what the next step is. I spent about a day goofing off instead of working on the task (or anything else). Actually, not bad for me :P
What ended up getting me unstuck was writing down several questions about the task and pretending it was a school assignment. I then proceeded to find out the answers to the questions and write them down as if it were an assignment. The questions didn't get the task done but they did get me to a point where I've been able to determine the steps I need to follow to get the real assignment done. It seemed pretty silly to me, but it worked.
Pretending you are in school may not work for everyone... especially if you really are in school ;) I often think that in some ways school was easier for me because there was more structure. I did what the teacher told me to and I automatically learned what I needed to in order to move on. If I had a question, I always knew who to ask (the teacher).
Maybe part of getting myself going now, is just to provide myself the structure I seem to need when I'm unsure what to do next...