Memorization Techniques

As rappers, poets, students, etc we must rely on the power of memorization to present material or to retain information. I just wanted to know some of your memorization techniques. Some emcees feel more comfortable reading the lyrics while some enjoy memorizing them.

I utilized a stacking method in the past (I would usually memorize four lines at a time). This method revolved on a lot of repetition and mastery of one line at a time. Once the first line is mastered then the second line can be mastered and so forth.