I did something similar. I would find interview questions that I thought would be asked, write them down on a piece of paper, and then write a flow chart with very brief word or two about what I wanted to talk about first, second, third, fourth. Then I would load up cubetimer.com, ask myself the question out loud, then start the timer and answer it making sure I included everything I wanted to say.
This method worked really well especially for getting all of the content known that I wanted to. I didn't "memorize" any answer because that's not what the interviewers want to hear, but I did "memorize" the ideas I wanted to express.