St. Ignatius of Loyola instilled in himself and those of his Jesuit order, that idea that every little act and thought should be “For the Greater Glory of God." This became the motto of the Jesuits, and you will often see the initial letters of the original Latin, A.M.D.G. -- Ad Majorem Dei Gloriam – at the head of the writings of the Jesuit fathers, on their buildings, even on their tombstones.
Try and follow their example. Ask yourself constantly: “Is what I am doing this moment for the greater glory of God?” Even the most mundane of our tasks can be transformed into a sanctifying labour for God if we teach ourselves to think constantly in these terms. Whether we are praying our Divine Office, or whether we are doing the dishes after dinner, taking an elderly relative to the doctor’s, or even, yes, even playing a video game or watching a movie—anything can be of supernatural merit if it is done for the greater glory of God.