Honestly? I think the problem is lack of motivation. You don't sound like you're lost on how to get plan, or how to set goals, so I won't bother throwing that information your way.
But a lack of motivation leads to procrastination, which really kills any shot of completing a goal. (And if you DO need help setting up a goal and starting a project, I
wrote a blog post on how to set up a short term project!)
My suggestion? Just DO something. Don't think about it. Just do one little thing towards your goal. Then a little while later, do another. Keep track of what you do somehow (write it down, mark it on a calendar, etc.), and you should have some motivation eventually. Good luck!