Everybody needs to be happy always but sometimes we get into depression due to life challenges. There are things we should do to remain happy because depression can cause death of a person. Most of our friends know how to overcome this problem, they watch videos of love and hope, read books, listen to worship and praise music, favorite film and they always think in a positive way when they are sad.
They have long life, strong and health. They are always creative, productive, happily related, successful, have ability to think, attractive and more optimistic. I can conclude that there are many benefits of being happy though we will never be happy always but the more you are in a sad mood the more you get dragged down.