Ever since we first started writing together, me and K. Trian have drawn all our main characters (and some side characters as well), put them on a big piece of cardboard, and put it right above our computer's monitor so that we have the pictures there all the time when we're writing. I've found it somehow helps me stay in touch with a given character's nature, the pictures remind me of their size/shape/clothing/any gear that's particular to a certain character etc. And seeing your MCs is also inspiring.

Granted, neither of us is that good (K. Trian is still a notch better than I am) but we've found it's a lot of fun to draw the characters.

So, anybody else here do this?