1.turn on the light before go into the toilet.
2. turn off the light after you have done.
3. turn off the tap after you use it
4. flush the toilet after you use it
5. keep the toilet clean
6. Don't too waste the water
7. Too much TV, computer, game are bad for your eyes.
8. Don't splash the water all over the sink.
9. Carefully squeeze out the toothpaste
10. Don't keep the water running
11. tidy up / clean up