I have read the other responses and I agree with them. My son was WONDERFUL at 2, no problems with the "terrible twos", but when he turned 3, it was like he became a totally different person. He was no longer the sweet, agreeable lil person. But as time went on, it fazed out for the most part. Not that he always agrees with me now, but I have changed tatics and now use "positive reinforcement" I have a sticker chart and reward him with a sticker when he does things I ask or things that are his "jobs", such as picking up all his toys in his room and around the house at the end of the day. Brushing his teeth use to be a battle, now he earns a sticker for brushing his teeth. He can also loose stickers though for unwanted behavior, such as me having to ask him over and over to do something, then I cross a sticker off. For each sticker he earns, he earns 10 mins. of video game time. (You could use another incentive for whatever your daughter really likes.) He has all week to earn stickers as we do not let him play vid. games on school days. By the weekend, he'll have earned plenty of game time to reward all his effort. I have his max. video game time on weeknds at 2 hrs per day. We still have issues from time to time, but this has dramatically reduced my frustrations and our friction. He has come to think of all sorts of positive things he could do to "earn stickers", some are a little too easy and expected and I explain that to him. But this has really helped in our house. I use to think sticker charts are just a pain in the butt, but it really has worked for us.
A.