Got a presentation or sales script to remember? No problem. You have a technique you have used many times before and it works.
By repetition, you have remembered the lyrics to many many songs. Do the same thing.
Read your presentation into your voice recorder on your phone. Then listen to it over and over again – while driving, while brushing your teeth, before bed. Repetition. One word triggers the next.
One time I remembered a 90-minute speech word for word!