I've been struggling to finish tracks too. Fortunately, I've had some free time to work on music this summer and I finished a couple of tracks. Finished them rather quickly as well. Each within 24hrs for the basic track. Another day fixing odds and ends. Seems slow compared to others on the board, but then rather quick when compared to anything else I've done (zero). That I had them done in a day I think is important for their completion. Too long spent listening to the same track, I think, may lead to bordom with the sounds and loss of feeling for the vibe. That's what I think might be my prob. Mental barrier too, I'm guessing. Sometimes you just have to do certain things before you realize you can do certain things.