Is your attention being used with your will or is it being used by an automated routine in your mind? Using your attention in the direction of love is generous, in the direction of fear and misery is selfish. Either way, your attention is in use thousands of times a day.
One way to make the practice of mindfulness fun is to turn it into a game. Where is your attention? Did you lose it? Where did you go? How much time passed since you last had control over your attention. In the beginning it might be hours, or even days. But with practice you will have awareness of your attention throughout the day. When you practice you get good at the game and your mind can no longer play tricks on you. Such is the game of Awareness and Mindfulness.