A good poacher disrupts and puts tremendous pressure on the returner of serve. If you are not poaching enough because you have made mistakes or feel it is too hard, check your distance from the net. Most league net men tend to stand too far back from the net to start the point, because they feel they must cover the lob. From this distance it is too hard to put that poach away. Forget the lob. The server must cover this shot, not you, unless it is short. Your job is to terrorize the returners and get them thinking about you. I teach my students to stand close to the net so when they poach, if they get their racquet on it, the point is over. I ask them who do you hate to play against? Invariably, they say, that aggressive net man. Well, then isn't about time that you become one.