For the last half year I've been memorizing a ritual. What that process has looked like is I would spend a week memorizing the lines for one particular segment of the ritual and making sure I really had those lines memorized. Then I would move on to the next segment. In the midst of this memorization I also ended up modifying the ritual and adding some additional lines of my own, so those also needed to be memorized and integrated into the working. I needed to get a feel for how what I added fit into what already existed.