I always bring sketch pad with me to most meetings. Sketching in meeting is a very good way keep myself awake and not get so boring. My boss doesn't mind me doodle during meeting. That's totally awesome, long as I listen meeting and then I'm good...
Here are sketches I done in meeting.
Sketches of Alice In Wonderland and at right is caterpillar from Return to Wonderland by Zenescope Entertainment.

Random sketches of anatomy...