I have a two year old who was refusing to take off his boots, coat, snowpants...somethin g I know he is capable of. I just left him in the entranceway until he finally gave up and did it (checking on him of course without speaking to him...not giving him attention for it). Also, tons of positive reinforcement when he finally did it...now he is eager to do it to receive the big "bravo!" when I see he did it all by himself...he is getting faster and faster now. It's a combination of not giving in and giving tons of praise like they have just done the most marvelous thing in the world when they do it right.