When the basketball is on the opposite wing, and you are on the block it may be a great time to flash to the high post area to get a catch. If the defender is right on your hip, and you feel like he/she is over closing you out and is not under control, then this is the perfect time to use a quick attack move, and drive the basketball right past them. Basketball drills like this are all about working on game specific moves. That way when the opportunity presents itself in a game, you will be able to make the correct move.
Another thing you have to consider is whether a teammate is posting up in the near side block. If they are then you don't want to drive the basketball down right on top of them. If they are posting you can quick attack back to the block that you came from, or they may space to the short corner and leave the block open.