If I can't sit down and get something completed start to finish pretty quickly I lose interest in it quickly. I had been working on the Stovebolt book for almost 3 years, and finally got back on it this summer to try to finish it. Around Thanksgiving, I was waiting on some parts to get shipped for it, and while I was waiting I sat down and wrote another book from idea to final draft, cover design art and all in just 3 weeks. So now that i'm on a roll i'm going to finish up some other book projects. But its fun though.
