i made sure my sun would come on comand, so i could take him outside without him flying to a tree and waiting up there for me to come get him.
i started by standing a little too far away for a step up, then offering my finger, as with a step up, so he had to jump the distance, then gradualy, standing farther away, so he had to fly. (come tiki!) now its a conditioned reflex, he doesnt even think about it, just comes at once.
ive never tried to teach him to go the other way. just wanted him to come. you might ask the, return to cage, question on the discusion forum, a falconer, called falconerwa, hangs out there some times .