Some people might use a spoon to stir their tea.  I usually do except for when I'm trying to photograph drops.  I just keep dropping milk little by little and it seems to stir itself.

If you want to try and photograph drops, here are a few tips.  Use a tripod to keep your camera still.  Put your shutter on continuous shooting so that you enhance the chance of catching the drop at the perfect time.  You'll need a fast shutter speed to ensure a crisp drop.  I also use a spoon or something in the liquid to focus my camera on.  I then lock the focus and shoot away.

If drops aren't calling to you today, what else might you be stirring?