It is helpful to have a clear visual image of the foot and to develop an understanding of how it is meant to work in walking.
As we move up to the talus after initial heel contact, start to make contact with the balls of the foot. As we do, we want to see in our mind's the medial and lateral length-wise edges of the foot.
Noticing pressure start to build on the ball of the big toe helps to define the strong part of the foot, along the longitudinal arch. We want to use this part of the foot as much as we can.