Geez I've known alot of nuns! Some great, some less so. This is no one in particular, but I'm naming it after my 1st grade teacher Sr Gabriel. She was terrifying, the closest we came to the ruler-on-the-knuckles variety.
When I can muster up the juice to draw, I try to just keep going. Whatever whim gets thumbnails, uneven diagrams, tangents. This way when I don't have that juice (usually) I can flip through notebooks and find some little nugget to work on. Or sometimes I find something random that I don't remember drawing and I'm not sure what it's about and those are my favorites!