Ответ:

Get up early and go to bed early to keep fit

Take regular exercise to keep fit

Take a cool/cold shower to keep fit

Eat healthy food to keep fit

Never smoke to keep fit

Clean your teeth every morning and every evening

Wash your hands before meals

Too little food makes you thin

Too much food makes you fat

Junk food makes you ill

Too many sweets are bad for your teeth

Never skip breakfast