I keep notes on approx. how many are left in the trees. 1/2? 1/4? If it's an area with a lot of trees and they are falling, the lawn could be covered again in a day or two. Blowing off decks, patios, porches, driveways, flower beds, etc. are part of the leaf clean up. Most customers will call and complain if you miss these areas. Always consider these areas in your estimate so you don't have to do them for free.