You shouldn't smoke because it's bad for your health
You shouldn't watch video and TV too much because it's bad for your eyes
You should help your friends because you may need their help one day too
You should go to bed after 10.00pm because you will be too tired to do your school work the next day
You should explain to your parents everything about your problems because they care for you and will do their best to help you
You should read more books because reading develops imagination