You can select District, Project or Road (eg. Woodlands) to locate certain area. This system will only extract out the new listing (first time advertise). In this way you don't need to counter check with your past data and to avoid calling the same person. It will save you a lot of time. And also, it is important to show your buyer the new properties in the market so as to prevent other agents from showing them later. Just remember, "Good Properties Are HARD TO COME BY! Show it to them NOW OR NEVER!"