It's idiotic not to vote. Simple.
By not voting, you are basically letting "those who show up" make decisions for you. In what other venue would this be acceptable?
Would the average WalMart shopper allow the cashier to decide what brand of toothpaste should be purchased that day? Okay, I know, bad example (having teeth does not necessarily equal shopping at WalMart), but the point still stands.
The reality is that something like 30%+/- of eligible voters will actually show up at the polls today. Yet our communities are far more important than shopping expeditions to WallyWorld and decisions about taxation, land use, community development, and countless other points are far more important that toothpaste.
In the end, voting matters. Each and every vote does count. There are people out there...I will add evil people...that count on voters NOT showing up. Don't allow these folks to win. Don't allow others to make decisions for you. Don't treat voting as being some inconvenience, subservient to a shopping expedition to a place where actual pants are optional.
Don't be an idiot - Vote!