Just finished putting up a mizzen mast for exactly this reason (plus it lifts the dingy engine etc) Depending on the boat it can be worth looking at being able to set a small sail on the backstay to balence the windage. Being able to chose whether to weather cock bow to wind or stern to wind can help in lots of situations. The teckneque of using a burst of power against a hard over rudder to push the stern on way or the other (not so much that you gain way, just push the stern) is my most useful techneque. With practice it will come but everyone, no matter how experienced, finds some difficulty untill they get used to a boat as they all have there litle foboils