What does a monk think on a day to day basis?

I go through my daily chores and it has become habituated to the extent that i do not need to concentrate on the action and my mind has some time to do thinking or just wander. Now monks life is also similar in that they repeat the activities over life time. So my question, what does monk think on daily basis? Does one control his thoughts or let it wander without attaching oneself to the thought? How does a monk achieve oneness or prepare to be in present? Regards, Contemplating One