One of the hardest parts, tbh. Harder than actually memorizing. I went with classical sonnets, looked for greatest all time lists and found things that were new to me, had stood the test of time, and spoke to me in the moment.
Cool, thanks for the insight! I'm now considering attempting this as I've started worrying about memory and how to keep it active and healthy (in my mid 30s but people seem to make a big deal about it).