Is there a method to my madness or am I just crazy?

This is a question I've been asking myself a lot lately. I finally finished a manuscript I've been working on since June. After a million rounds of edits I finally marked it complete and sent it to my agent. Now it was time to start something new, or work on something old. So of course, in typical Theresa fashion, I didn't choose just one. Currently, I'm working on 3 WIP's and rewriting another. Every time I lose my focus on one, I jump back to one of the other ones. There's so much jumping, I feel like I'm not getting anywhere.

Then there are times when I think about working on one of my projects and instead of actually working on one, I just think about it. I never open the document and actually get words down. By the end of the night I got nothing accomplished and feel terrible. This happens more times than not. 

Some how in the end though, it could be three months or six, I always manage to finish another first draft. How I have no idea?I just wish that I could sit down and write every day on one project. But maybe that doesn't work for me and I should just continue what I'm doing. It might make me an unorganized mess, but I accomplish something. So do I really need to change how I do things? I don't know.

Do you have a method to your madness?