One of our cars was running a little rough so I took it into our local mechanic last week for a tune-up. Turns out in addition to the tune-up I was a little behind on some of the maintenance. A new water pump and timing belt later and the car is ready to run. I could have postponed the work, but eventually it had to be done and if I had not taken care of it quick enough, there may have been some real damage to the car.