We started by having DD put her pacifier back in bed each morning and after naps - if she put it there herself, she was fine, but if we took it from her the world was going to end :) Once she got used to that, I snipped the tip off and told her that it was broke, but that she could still use it if she wanted to. She stubborned her way through for about a week before giving it to me to throw away. She's not said a word about it since, nor have we had any problems with her taking her baby brother's pacifier.
Similar to what the PP said - a friend of mine tied her son's pacifier to a string attached to a kitchen drawer - the only place he could have it was standing next to the drawer (not even laying comfy in his bed). She said it only took a couple of days before she noticed that he wasn't hanging out at that drawer ever.
at 5:03 AM on Nov. 18, 2009