Dummy wise I can help you, I got this from MN, was convinced it wouldn't work but it did.
You tell your ds that tomorrow is a big day because he is going to throw his dummy away all by himself because he is officially a "big boy". You remind him of this big day as a sort of celebration and say that after he has thrown away his baby dummy he gets to go into town and choose a present for big boys only to replace it.
The day arrives and you watch as he throws his dummy in the bin - no you cannot retrieve it later! You make a song and dance about it, clapping and shit like that. Then you take him to town, to the pocket money section of Woolies or wherever and he gets to choose something else.
He will not ask for his dummy again. I was sceptical, I thought she'd ask for it that night, but she didn't and the dummy was gone forever. She still remembers the day she turned into a "big girl" and what present she got!