I once played a comedy Sherlock Homes in a wee amdram production. For the huge, great, big, lengthy and daunting speech at the end where Sherlock reveals who the villian is and how he did it, I had to make up a little 'mind palace' of sorts to help me remember it all. Each clue from the monologue was, in turn, mentally matched to a different well known location on a favourite walk of mine. Worked a treat and I could remember it for ages afterwards too so it really works!.