Last night I drew some 1-minute figure sketches by using the Sketchdaily Gesture Generator. They seem to have a good collection of costumed figure photos. Another figure drawing generator I use is Pixelovely, although their photos start repeating themselves after not too long.
I like sketching in ballpoint pen. I think it goes back to my childhood when I would doodle on church bulletins during sermons. Later on I started bringing my own sketching materials to church, but at first I knew I could always rely on Mom to have a good ballpoint pen in her purse somewhere.