Don't Use Your Umbrellas If It's Not Raining

That is all.  But really, if it's not raining, you don't need it.  Believe me.  The point of an umbrella is to keep you dry when its raining.  If it's not raining, you don't need it to keep you dry.  Even if it's like a drip of rain every 153.6 seconds, you don't need it.  Trust me.  Try it one day.  You'll like it, look like less of an idiot, and make me happy.