"Do you have the patience to await right action to arise?" was a sign in my first teachers house (which we would walk by during Kinhin). Meditation's effect on your life and happiness probably varies based on what things are you are not seeing in your normal life. When I started meditating, I immediately discovered I was angry many times a day; several years later, having tried to respond to this reality in various ways, I got divorced as I found it impossible to ignore this previously un-perceived aspect of my reality. Now I am happier and more calm and so on, but the meditation definitely caused some shake up not more calm for quite some time.