If you want happiness in every moment of your life this is definitely the prayer to use. It will help you to be happier in each and every moment:
Dear God
I have some happy moments in my life and I am grateful for those.
But sometimes I still get depressed about some things.
That’s why I’m here today - to ask for happiness in every moment of my life.
Please help me to find happiness in the small things.
Please help me to see how I can be happy even when things don’t go my way.
I know I should be more grateful, and that’s why I’ve come to You with this prayer.
Amen