E.C.
My friend taught me the one-day method, and it has worked for all my children. Plan to spend the entire day in the bathroom. No answering the phone/email/cooking/laundry, etc. Have books, games, etc all the things she loves to do with you in the bathroom. Have little treats (she doesn't usually get) as rewards for *keeping her panties dry*. Get her to drink as much liquid as possible. I'm a health nut but let the girls drink chocolate milk and undiluted juice all day. Big treat. Then you make it goofy fun to practice running to the potty (from inside the bathroom). "What do you do when you need to go to the potty?" over and over. Play a game, read a book, do it again. Let her feel that her panties are dry. "Wow, you kept your panties dry! Have a goldfish/skittle!" The reward is not for peeing on the potty, but keeping the panties dry. They will pee a lot that day b/c of all the liquids. You will cheer and be so supportive of it and give a treat for that, too. If she takes an afternoon nap, stop the liquids 2 hours ahead. I put my girls down with a diaper (my friend did not). You get 80% accuracy in the first day. Making it fun (nobody is watching how ridiculous you look) and positive really works. When they have an accident, you stay cheerful (so hard for me). But it really helps.