M.C.
I am a big advocate of the "get rid of the diapers" method. With both of my girls, when they were ready, and so was I (YES, IT IS IMPORTANT FOR YOU TO BE READY FOR THIS LEVEL OF COMMITMENT!) We had a little discussion, read all the potty books and for the waking hours, wore panties. Yes, it is messy. This is how she will learn. You might have to ask her every 15 minutes. If she hasn't gone in an hour, sit her on the potty. If you need to get in the car, sit her on the potty. It will take as long as 2 weeks before she really "gets" it and can tell you before it starts running down her leg. No scolding, and big time rewarding has worked wonders for me! Bring the potty chair with you in the car. Pour out the pee in the grass and rinse it out with water. This has saved me many times!