It's old school and not the most popular method these days, but I use the book "Toilet Training in Less than a Day" by Nathan Azrin. I don't follow it 100% but I do use his methods for an intensive one-day go of it. It's worked amazingly well with my first two. They were seriously both trained in less than a day (and dry all night in less than a week). We'll see what my third child has in store for me!