Mom, how do you deal with grumpy days?
I am generally forthright with my family in telling them how I feel and to please just give me some space or I may not respond very nicely. They tend to back off.
I may take a nap or time to read a "candy" read (enjoyable, fast read of a book that doesn't require any heavy thinking to help me get out of my funk).
Chocolate and pizza soothes the my grumpiness too. :)