Yes, its answer is not as simple and unclear that we just say 'Just be happy to become happy'.However,it works somehow as people say you just start acting to be what you want to be and continuously acting and practice will make you that.But guys atleast we should try to answer with the bottom of our creative mind,that everyone has.Anyway, in my opinion, mostly our unhappiness relates to other persons so just keep in mind that we are responsible for what we say or do and ignore the things that others do.Only our attitude should be nice to others and in return people do what to us,don't care about this because we have to serve others for the sake of God and not of others.Psychologists also recommend people to have this thought to be happy.Secondly we have to accept the things around us as they are,the things that can never be changed and we have to minimize the word 'why' from our thoughts and talks.The thing which is present in this moment was not before this moment and will not be after this moment,even if it is pain, its intensity will not be same so just enjoy and my this statement makes myself laugh when I used to say to my friend that there's need of some abnormality but we can enjoy every single thing,no matter its pain or whatever, OMG,the life is so beautiful.You know what, there is only one living thing in this world who enjoys everything in this world and that is man,he can even enjoy pain and its psychologically proven.

the most important thing to become happy is, you have to give the appreciation for yourself by loving yourself and enjoy being yourself, and you will get the biggest happiness :) (i am ever so sorry, i misplaced the answer in comment space :), it should be here)

the most important thing to become happy is, you have to give the appreciation for yourself by loving yourself and enjoy being yourself, and you will get the biggest happiness :)

I agree. "LIKE"

just enjoy your life! and became better day by day