Rudas:
I have a Reims Rocket, but previously have frequently flown other 172s, particularly the P model.
Other people have made the point about speed control on final approach. 60kt is right for a normal short field landing, perhaps a couple of kt slower if at light weight.
However, what about power? Some instuctors teach the advantages of leaving on a 'trickle of power,' particularly when flying four up. This does tend to produce smoother landings, but will cause a lot of float. If you're looking for short landings, make sure the throttle is closed as you flare.
AA