Surfing with a ding in your board can shorten the life of it drastically. Once the foam gets wet, if you don't dry it out completely, you can be sure your board will start to de-laminate. But you don't want a simple little ding to make you miss that epic swell headed your way either. Get a little ding repair kit and keep it in your glove box. That way an accidental drop in the parking lot doesn't ruin your sesh.