Are you trying to do something everyday that makes you happy? Or do you go through the required motions of each day and as you're lying in bed reflecting on the day, you can't think of one thing that gave you a moment of happiness? Each day needs to have a moment of happiness for you. Life is too short not to experience that feeling each and every day.
Tomorrow night, make sure when you take that time to reflect on your day, you can identify your happiness of the day. And make sure to make it a habit to experience that everyday, for the rest of your life.