I made a vow at the beginning of the semester that I would not complain about grading. Ever. (at least during this term). Because, quite frankly, as miserable as I might make myself by procrastinating, or by mis-timing certain assignments -- my teaching load is lighter than some other people I know and I feel guilty about ever possibly complaining in a venue (like this) where they might hear.
And, of course, it's spiritually better for one not to be complaining, or focusing on the negative. So I've been practising saying more affirming things to myself like
"I am discovering what my students are learning"
"I am a responsible teacher who provides feedback"
And it is actually sort of working to improve my attitude.
(Or if it isn't -- you won't hear it from me here.)