I too feel your pain. I took a break from the cab to do a door, I guess I just needed to feel like some progress was being made I put the final coat of primer on the passenger door yesterday , it's now ready for the final sanding and color. Back to cab for a while.
This is a hobby for me so I am not methodical in what I work on today. I keep it interesting and fun. When its not fun I take a break for a couple days