Burn out?

[StarSock64]

This is kind of different, but I'm unable to sprite late at night because it gets too dark outside and it affects my eyesight a lot. It's a mixture of sleepy eyes and the lack of sunlight screwing up my ability to see the screen properly. Everything just looks like a blurry mess. I literally can't see what I'm doing, so I have to hold off until the next day if I want to accomplish anything. Lineart is still somewhat doable, but when it comes to shading, forget about it.

To say something more similar to the original topic, I generally jump to a different piece when I'm burnt out on something but don't want to take a break. It's at the end, when only the hard parts on several different pieces are left, that I'm in trouble...