BOX JUMP:

Find a box which is about 10% higher than your best vertical. Jump up on it and then STEP DOWN. Do not jump off of it.

DROP JUMPS:

Find a box about 3 feet high and drop off it. Absorb the shock and do not jump up. This is only meant to prepare you for the ballistic shock of further training.

DEPTH JUMPS:

Find a box about 2 feet high, drop off it and immediately rebound upward 3 times. This is one set.