My son fully potty trained in a day. I saw the book Toilet training in less than a day recommended on here, and bought it on Amazon, I think it was around $6. SOOO worth it! I was really impressed, and potty training my son is the easiest thing I have had to teach him. I was prepared for it to be hard and frustrating, but it wasn't at all. Some of the big things: NO pull-ups! They are the same as diapers, and do not teach the kid anything. If they get uncomforatable when they have accidents, they won't want to let it happen. People have told me they made their kids sit in it a little while to teach them... I only did that once with my son, and it was when he did it on purpose when he didn't get his way. That was a couple weeks after potty training, and he hasn't tried it again since (a few months now).
2nd: Encourage him and make him feel proud. With my son, I told him that it makes mommy sooo happy! and grandma and grandpa and puppy... and just keep listing everyone he cares about. Then when he does it remind him how happy those people are, and make sure they tell him when they see him.
3rd: All the liquids you can get down in the begining to give him practice. Kool-aid, pop, whatever for a day or two and just focus on potty training. It recommends that it is just a parent (or parents friend) and the child, noone else around to distract them, so a weekend at home with mom or dad would be best. As a reward, every time my son was still dry and went, he got a handful of frito's, if he was wet and went after the accident, he got one. The book reccomends salty over sweet, because it makes you thirsty. I never said one negative word about the accidents, I just encouraged him to try to stay dry so that he could have the fritos and "make Mommy soo happy!". He was soo excited and proud. The first day he had a lot of accidents. But he woke up the next morning, went straight to the bathroom, and didn't have any accidents all day. We went to skateville that day, and out for dinner, and he stayed dry at both.
A way to work around the using underwear instead of a pull up (in case of accidents) is to take a platic bag (like a cub or target bag) and put it over the seat of the carseat. That way it is protected if they do have an accident in the car, so you aren't soo worried that you don't leave the underwear on.
This book was tried on 200 children, between 22 months and 4 years. All but 2 were successful in the first day, and the 2 that weren't both had fathers who thought they weren't ready and were against potty training.
Also... he is COMPLETELY independant. I have to wipe his butt... but he does the rest. I don't even go in the bathroom, he doesn't need me to. If you continue to have problems I highly reccomend this book, and either way, $6 is worth it even if it just makes it a little easier, isn't it? That was my thought when I bought it, and as I read it I got more and more excited about the things it said and the way it explained the proccess. (Another thing I did but didn't focus on the way the book said, was to get a doll that pees and have him help you teach the doll to do it, before he does it on his own. I think that is more helpful for young kids who can't communicate well yet, my son was 2 1/2 and pretty much skipped that part, and still did really great).
GOOD LUCK!!!! I HOPE IT WORKS!!!! Let us know what happens!
J.