How about hanging a ping-pong card on your wrist?

This problem has been formed by you for a long time, and it is not easy to change it. Only remind yourself at all times.

When you practice, don't always count with others, so you will concentrate on the game and forget to correct your movements. Do more ordinary exercises, and always concentrate on correcting actions in practice, until the correct actions become a habit!

Personal experience for your reference!