Here I mean both Physical and Mental fitness.
Your thought process should be creative and pleasant even if you are the last survivor of this planet.
This piece of thought is mainly oriented towards all the lonely people, particularly the aged.
Don’t leave all your hopes behind and lead a lazy, meaning less life, caring little about health or happiness.
Do your exercises.
Cherish good moments.
Spend time on your favorite hobby.
Be mentally strong.
And always try to be in good shape -both physically and mentally.
That can give you a lot of confidence.