1. go to school on time.

=>You should go to school on time.

2. finish your homework before playing video games.

=>You should finish your homework before playing video games.

3. spend much money on video games.

=>You shouldn't spend much money on video games.

4. take part in outdoor activities with friends.

=>You should take part in outdoor activities with friends.

5. spend much time playing video games.

=>You shouldn't spend much time playing video games.

6. do exercise every day.

=>You should do exercise every day.

7. stay up late at night.

=>You shouldn't stay up late at night.

8. eat a lot of fruit and vegetables.

=>You should eat a lot of fruit and vegetables.