The rosary can be a nourishing prayer or it can be somewhat exasperating, with the decades going by with little or no comprehension of the mysteries. I've found a helpful book aid of late, helpful in the sense that it's pocket-sized and includes icons to help focus on particular mysteries. (The art is to my taste, with a Byzantine bent.) I'm speaking of Michael Dubruiel and Amy Welborn's Praying the Rosary. It also helped open up the Joyous mysteries to me. Before they seemed tinged with non-joy (i.e. the loss of Jesus and presumed dismay of Mary, the sword that would pierce her heart, the lack of inn, or hearts, the Holy Family found). But the book emphasizes the positive side of each mystery, which pessimists need, and there was also the helpful reminder on every page: "Ask Our Lady to help you pray this mystery." I've become increasingly mindful of the help I need to do just that.
The book (which you can look through on Amazaon):