Eat more fruits and vegetables, not picky eaters; Eat more blood-enriching foods, such as spinach, peanuts and red dates. Don't eat cold food, let alone cold drinks. Eat more warm food, such as mutton and radish.
Then you must exercise. Life lies in exercise. People who don't exercise are always dull. Don't stay at home all day. Going out to see the sunshine, exercising and getting in touch with the outside world can also make people refreshed.
I wish you the best of health!