Sitting on your jacket/coat during a lecture is very uncomfortable.  To avoid looking like you have gas or an itch in unmentionable places, make sure that you have moved all potential uncomfortableness away!

Note:  This includes people.

When scooping ice cream, making up a song and dance is perfect if you want ice cream to land on your clothes.

Don't wear a tight, short skirt. While walking you will constantly be pulling it down and all those around you will notice you like a orange construction zone cone.

Sometimes, less is more, especially when it concerns t-shirt designs that you want people to wear in public.  Compromise is the best solution to have a cluttered, clunky design.