12 Ways To Be Happy:

1. Make up your mind to be happy.
Learn to find pleasure in simple things.

2. Make the best of your circumstances.
No one has everything, and everyone has something
of sorrow intermingled with gladness of life. The trick is
to make the laughter outweigh the tears.

3. Don't take yourself too seriously.
Don't think that somehow you should be protected
from misfortune that befalls other people.

4. You can't please everybody. Don't let criticism worry you.

5. Don't let your neighbor set your standards. Be yourself.

6. Do the things you enjoy doing but stay out of debt.

7. Never borrow trouble. Imaginary things are harder
to bear than real ones.

8. Since hate poisons the soul, do not cherish jealousy,
Avoid people who make you unhappy.

9. Have many interests. If you can't travel, read about new places.

10. Don't hold postmortems. Don't spend your time brooding
over sorrows or mistakes. Don't be one who never gets over things.

11. Do what you can for those less fortunate than yourself.

12. Keep busy at something. A busy person never has time
to be unhappy.

And I could add Number 13: