Your primary training probably included a diagram explaining where the elevator and aileron controls should be positioned based on where the wind is coming from while taxiing. When we have such wind conditions-and even when we dont, if we want to be honest- we can and should use the ailerons to help control the airplane on the ground. Alas, we dont always have that diagram available, and its easy to forget whether the upwind wings aileron should be down or up. (Hint: It depends.) Lets try to come up with a one-size-fits-all understanding of when and how to use ailerons on the ground.