M.Q.
we are in the same situation! I did just like you mentioned, stickers, then m&m's, etc. so far we are about 90% trained during the day for about a week. I really do think it's different for each child, but what I found really helped 'click' was the Potty Power dvd. I actually got ours on our netflix (well blockbuster, but same deal) and she LOVED it. we had had books and the elmo video too but for some reason she really just loved the Potty Power one. I also started giving her an m&m for 'practicing' and then some fruit snacks as a 'treat' when she did go. I have to laugh because before the Potty Power dvd everytime we'd ask her if she had to go potty she'd answer "No thanks". LOL
You might also find helpful is this website I found and was ready to purchase, but then she started going on her own so I didn't buy it. http://www.3daypottytraining.com/ I haven't heard anything about it, but it might be worth a try?
Good luck!!!