simple...just build fast, by the time you get your 1st marine (should get it in 4 min flat, tanks in 7 or 8 mins), take it and a SCV, and bunker the zerg player in. Their first units can't break through a good offencive bunker, and when you get tanks, you already won, just make sure u add Missle turrets, and tech up to BC's so they can't out do u! While you got em conered, take the map! If they leak an overlord out with ventral sacs and a drone, and you don't see it....it could mean trouble...scout often, even if they seem down, they may not be out...yet...