Make the co-pilots hold the ailerons into wind while taxiing, and in the early stages of the take-off even if it is not their sector. The captain has one hand on the tiller and the other on the power levers, and the co-pilot is often sitting there with mind in neutral, while a crosswind buffets the ailerons on the roll, and lifts a wing. Two crew operations must be done properly on the ground as well as in the air.