Happiness comes from within. When we try to be happy, everything around us seems to be beautiful. Being happy is the easiest thing one can do to drive his life better. Life becomes calm and peaceful when one tends to be happy.
So, what is the key to happiness? What is that mantra that distract us from our problems and make us happy. So, as I see it, the mantra to happiness is hope and faith. But there is a limit with this. 

The hope and faith we keep that should only and only for ourselves. When we start to believe in ourselves, there is no one to stop us. When we keep a hope in every work, we find a different level of satisfaction. Here, we find happiness.
The second mantra is to lower your expectations. Expectation is the sole cause of misery. When we expect too much and it won't fulfill, we become sad. Being happy with what you have is the second step to happiness.

It is said that "A great obstacle to happiness is expecting too much happiness."So, lowering your expectation and accepting the reality can relax your mind and heart.
The third one is giving. The pleasure we get by giving is incomparable. When we have the capacity to help someone, we should do it because that brings a positivity in our life. Again, when we give it, we should not expect anything in return.

Gratitude is the fourth one. Remembering about what you get in life can make your joy double because there is no one in this world who has nothing for which he should be grateful. At least, we can be grateful for this beautiful life.
Do the things that pleasure you the most! Never ever think about what people will say or think about it. It's your life and you have full right to live it in your own way.