I think what worked for us was that we didn't push them at all, they just seemed ready (they were 2 months away from being 3). It never bothered me talking with other moms whose kids were already trained at our age, I knew it would happen sometime and I was totally going for the path of least resistance. However, the fact the they had to be trained in order to go to pre-school this fall was my motivator. We took the kids shopping a few days before and they got to pick out their undies and we talked a lot about it in the days leading up to it.
Another thing that I think was key for us was just going cold turkey, no pull-ups during the day. I really think our kids wouldn't have really gotten it if they were still wearing something that was so much like a diaper all day. Another thing we did (that I read about) was to not ask them if they had to pee but rather to say, "Tell mommy or daddy if you have to pee". I'm not sure if that made a difference or not but it didn't hurt. And staying home for a few days straight really helped too. We spent a lot of time outside or just hanging out upstairs on the hardwood floors and of course lots of water.
Oh and of course good old competition and bribing....smarties!!! Maggie was the sneakiest in the beginning with the rewards - she would do her thing, get her smartie and then literally 5 min later she claimed to have to go again. And sure enough she would get a drop or two out so of course she deserved another smartie, right? She's not just good looks!
The thing that I was dreading the most was public washrooms but it actually hasn't been as bad as I thought it would be. I was picturing being out alone with them and 1saying they have to pee and taking everyone to the bathroom, only to do that again in a few minutes when someone else who said they didn't have to go, now had to go. But we just make sure they go before we leave the house and they are are pretty good with making it through a morning without having to go again (especially the boys). And of course we leave a potty in the van for when we need it. They've also peed in a bush or two which they were so excited about.
Right now, they are still in diapers for naps and overnight and although Mitchell is dry sometimes we'll keep things this way until they are dry a little more often. To be honest, because they sleep so well right now I really don't to be up changing sheets at night (x3).


