Well first I grab a big kitchen knife. Then I sneek up behind my alarm clock. When it's not looking I attack and MURDER THE THING! Stupid clock. It was broken anyways, it kept waking me up.
I read, stare at things I want to buy, listen to music, work on random things like basic chores, the like. However, I do not kill time, persay. I love timepieces, and would never dream of destroying one. Except those crappy digital ones you get for a dollar, they're satisfying to destroy.