#9 is a huge:
"Find activities for your child where she will not be the best. Help her learn how to handle being in such a situation. Do not let her discontinue the activity because it is difficult or uncomfortable."
This didn't really help me, since I was forced to do baseball for years, while being horrible at it.
It did, however leave me with a lifelong dislike for sports in general and for much physical activity of any kind.
The key may be that the child has to have *some interest* in the activity, rather than being forced to do it.
So, you are doing an activity that you want to get better at, rather than be part of something that you just want to end.
