I'm not very systematically organised. There are many ways to get organised though, but I don't prefer it and to me, I don't think it's worth the effort. What I do to force myself to do stuff, is by cramming more into my schedule. I know that if I don't have a high load of work, I won't perform to my best. But if I can cram it full, I know that I can get it done to a decent standard (even if it's not my best).
There are ways to get organised though. So by all means seek those out from websites or self-help books or other people.