I imagine numbers as people! Does anyone imagine shapes as people? A circle is the friendly and outgoing dude, a square is bossy and opinionated, and a hexagon is always jumping up behind people and yelling "HA!! HEXAGON!!"
I do all my schoolwork online, so I can only doodle on my figuring paper, which I actually don't do.
Music is so wonderful, I listen to it whenever I do math.
I also like to set goals or rewards for myself, like if I do such-and-such lessons I can have that cookie in the fridge! Or if I get a question right I do a dance move! If I reward myself with little stuff and then big stuff at the end of the day it helps me do more work, or makes me happier about school in general.