For mental happiness have me time, focus on staying engaged and entertained. Avoid stress and keeping things locked up.

Eat good food..stay happy ..

For physical health try to have a balanced diet.. include lots of fluids like water, lemonade, chaas, coconut water etc in your diet..even milk..also try to have home cooked simple food and less processed foods..nuts in later stage, dates, also curd should be included daily..for mental health try to be Happ and stress free..keep yourself occupied..chant some mantra you like... .listen to music..read good books.. follow your hobbies and spend time for yourself