During the end of the project (almost always a slog) I'll set deadlines for myself each week with a set list of features I need to accomplish for that week. Hopefully it's obvious what's left to be done and you can make lists at this point. But when I've accomplished those goals for the week I'll take a break and do something fun.

I don't know how you work but usually the first couple months are a frenzy of work non stop but if I pace out the end a little better it becomes a lot more palatable. Also it's not the end of the world to take a couple days off if you come back with a clear mind ready to work, in fact it's usually more effective.

One more thing that really helps with overcoming the blues at the "almost finish line" is to get it in front of a few people and let them pick it apart. It gets me motivated before showing it to him/her/them to polish up any loose ends, and then after I have a new list of stuff that I feel motivated to resolve. Hope that helps! Goodluck w/ the project!