If there's one tip I can pass along that will lead you to organized bliss, it's this: Start small.
Like most people, you probably have a jam-packed schedule and very little time to spare. You probably realize how much you need to get organized, but you don't know where to start. And you just ignore it or shove it in the closet. So, I recommend that you start small.
Just organize one drawer or one shelf a day. Move from room to room as you desire. You won't see major progress, but you'll see some. Best of all, you won't have unfinished projects but a series of finished, organized projects.