Before pitching from the mound, throw from second base to home; then from behind the mound to home; and finally from the mound itself. It will look real close! I once saw an MLB pitcher taking a few throws from behind the mound before each inning, and have used this routine with my son whenever we go out for a bullpen. Not sure if taking warmup throws from behind the mound is allowed during games (anyone know?), but I know I saw at least one MLB pitcher do it!