I recently bought myself a copy of Making Comics by Lynda Barry and I've started working through the exercises, which begin with monsters. I was enjoying coming up with different ways to draw them, so decided to fill a spread with lots of different monsters, having no plan and making them up as I drew.
Not sure which is my favourite, maybe the alien looking thing with long spirally arms, on the left?! Although the fluffy one on the right hand page with big eyes keeps looking at me!