"Take great care to avoid the two pitfalls that most people fall into during the Rosary. The first is the danger of not asking for any graces at all. So, whenever you say your Rosary, be sure to ask for some special grace or virtue, or strength to overcome some sin. The second fault commonly committed in saying the Rosary is to have no intention other than that of getting it over with as quickly as possible"
St. Louis Marie de Montfort (via myrosary