I often sketch rocks and boulders when I’m warming up to draw. If I’m not in the mood, and my cup of coffee is more interesting at the moment, a couple rocks piled in a field or on the edge of a pond seem to loosen me up and get me in the mood to draw. Finding new ways to stack them and organize them ends up being kind of interesting too.
(After I drew these, I did a whole slew of sketches, which WordPress will automatically post over the next few days while I’m doing Halloween-sorta things. Maybe I’ll get lucky and get some costume sketches done in the meantime.)