Drive your knee up forcefully lifting you off the ground. Keep movements primarily in the sagittal plane. Keep your foot dorsiflexed, which means your toes drawn up towards your shin. Transition from one foot to the other, just like running. Focus on breaking the vertical plane with your thigh each time.

The high skip drill works the loading phase of the run. The key to performing the drill correctly is to focus on driving the foot down and letting it spring back up off the ground (rather than lifting the knees). Use the same arm motion during this drill as you use while running.