Trying to summon the motivation
Keeping work area clean, tools and parts organized and easy to find helps me feel a lot better when I step in the garage to get something done. When I hit unexpected problems, always happens, I stop, clean the shop, put tools in there place, get rid of clutter, sweep the floor, then walk away. Then come back later well rested and then good things start to happen.
I like to create a well defined scope of a near term achievable goal and get that done. Do that one at a time and you see progress over time. Get well rested, get out there, but dont be out working too long. The car projects are marathons paced em out dont go hog wild in any given session.
Other thing I learned the hard way is when your tired the brain is in a down graded mode and more mistakes will be made then stuff gets messed up creating more work more money. Monitor yourself dont be thrashing around burning out messing stuff up.