Perfect Punches

To make the most efficient punches, keep them straight and allow them to continue over a long period of time, make sure your thought is on the elbows going forward and back rather than thinking of the fists.
Because the hands are going to be at eye level it is very easy to make what you see, your focus, but this will result in floppy punches.
Keep just enough tension in the fists to hold the shape and then concentrate on the elbows going forward and backward like pistons.
This will help create the perfect punch.