OK, a year has gone by since you helped the Smith-Joneses buy their dream-home. At the time you noticed the two humongous broad-leafed Maples that overhung the front roof-line. Now you have the perfect opportunity to call and say: "Hi Mr. and Mrs. Smith-Jones, I'm just calling to remind you to get that gutter service over as soon as possible to make sure the water is going off the roof properly." What a great way to stay in touch and ensure your buyer's home is being well maintained, thus avoiding deferred maintenance issues when you eventually help them sell.  Happy November!