Great advice is given here, that is why I enjoy this site. One thing to think about is just to be thankful that you have the opportunity to build a car, and a pretty awesome one that at that! A car that many can only dream about. I hear guys at work all the time that say "man, I wish I had the ability or funds to build a camaro, or classic car" It is pretty cool that we are able to enjoy this hobby and own a piece of history.
Working on cars for me has become a place that I can relax my mind and put the outside garbage aside. Garage=Sanctuary? Maybe somewhat.
I suffer from classic car ADHD from time to time. Like Youthpastor mentioned, I do the same thing also. It has helped me to write out what I need to get done on my dry erase board and focus on those things until they are completed.
BTW, Can we get some more pictures of that thing?