HOW TO KEEP HEALTHYVersion en ligne What can you do to keep healthy? par Ana Mª Cifuentes Nartínez 1 BE ACTIVE 2 LIMIT SCREEN TIME 3 SLEEP WELL 4 PROTECT FROM VIRUSES AND BACTERIAS. Do some energetic exercise at least three times a week. Better walking to school than by car. Take the stairs instead of the elevator. Don't spend more than two hours a day in front of a screen. Sit down properly when looking at a screen. Have enough light when looking at a screen. Sleep at least nine hours a night. Don't use screens before you go to sleep. Wear comfy clothes when you are in bed. Wash your hands before eating. Brush your teeth after eating. Don't eat food past its use-by-date. Wear plastic shoes in the swimming pool. Use a tissue to blow your nose and throw it to the bin.