Self care - just taking a shower/bath can reset me. Get a hair cut, mani/pedi etc.

Get something done - this is a hard one, but forcing myself to get a task done can get the ball rolling. Something as dumb as pulling weeds in my yard can clear my head, plus some sun really can make a difference if you tend to stay indoors.

Hang out with someone - also hard when depression kicks in, but they can help distract you from your thoughts.