COACHBLU25,
I assume that you are talking about gaining ground in your movement toward second or replacing your feet. I keep it simple, with most of my players we replace the left foot with the right (which places the left in front), this is seen as a jump type of technique when done fast. We then stay low and throw as if we are in a slanted room. Stand up too early-hit your head. We go up and out which carries momentum toward second but does not actually move our body a great deal toward second.