I’ve heard good things about Neil Fiore’s The NOW Habit, so I finally read the thing a few weeks back.
It’s good. Didn’t change my life, as it apparently did for others, but I gleaned some good ideas from it.
In particular, Fiore recommends that you rest, then work. Schedule and take breaks before you start working on a project, so you’ll be rested and recharged and ready to face it. If you wait until afterwards to relax, you may not have time to, and you’ll get discouraged over time.
There are other good ideas in there, too, particularly relating to his Unschedule. Worth checking out.