What do you people do when it's a shitty day

[terry]

That usually means you need a break. Take a day or two off, do something different, clean your head .. or fill it with smoke and booze
I usually just work on things just at a slower pace. Take a few hours away, come back work a little bit on something else etc.. but the best is just to say fuck it and take a full day or two off. Come back with a clear mind.. its a great feeling. Good luck man!