an architecture teacher in college told me that ones of the best ways to relax your drawing hand was to draw spirals from the outside in… it makes you focus as you try to draw as many circles as you can but to not run into the other lines. it actually is supposed to make you better at drawing.
after a few doodles, just let the pen do what ever you feel like. it’s a surprisingly effect way to “let go” of what is on your mind.
so there ya go, for your second day, doodle away your thoughts! :)