Two people in the office today requested that I start my summer superstition post haste. In my own defense, it has worked for many years now - warding off hurricanes from our area.
So what is it? I print copies of the National Hurricane Center's 5-day cone of probability and put them on the front left (if you're sitting in my chair) of my desk -- where anyone can see them as they walk by my office.
So take that Issac.