This is what I heard in the life show in the two sets of CCTV's time ago. Now they are as follows:
Including 4 aspects:
1. The left hand of the right hand habit
2. It is best to take a bath close your eyes.
3. Put the picture, then watch it, see what is different
4. Visiting the stranger
I don't know if it is practical. Please try it out. If you have an effect, isn't that? Haha!