I have the same problem - but what is worse is that I'm a perfectionist, which means usually I walk away from a project thinking, "well, I'll come back to it and finish it (ie, do it the right way) later." This has caused me nothing but grief. Lately, though, I've been using a trick I learned in a design class I took: make a prototype. When I have an idea for a song or a story, I get the thoughts down in a form where I can work with them -- I'll make a thumbnail sketch, write a few lines of description, capture a few key phrases of dialogue -- and put them together into a folder labeled with the project. But the real insight here is realizing the project doesn't have to be finished (ie perfect). All you need is a working model. Then, you can start developing the model -- adding to it, editing it, reworking it -- and if all goes well, you can develop it to a point where it really is good enough to send out. Then, if you need to move on to something else, you are now in a position where you can store away all the materials you have put together so that when you come back to it, you have something real to work with. A better advantage of this, though, is that when you're working on developing a prototype for something else and think -- hey, I can use that picture I drew for the other project -- then its there for you to take and the two projects are now one. At least, thats the way it is supposed to work in theory -- nothing is perfect.