Something funny i discover: i had thoughts or tried to explain something decades ago and made a drawing. Some of these are just a circle with some arrows. Turns out it is really hard to make a drawing bad enough that you dont know what it is. It sometimes works better than even a written description. So you can just doodle in a notebook and tell yourself you've written it down. If you look at it regularly im sure rec…
Assuming you can type well.
Take a sentence, put your hands on the keyboard with the intend to type it but dont do it.
Some time later dont try to remember the sentence but just put the hands on the keys and let them type. Its really funny seeing the text come out of your keyboard buffer muscle memory.
Some japanese guy said he played with the concept and reported that he could fit a whole paragraph or a list of things big enough that he couldnt recall it without using his hands. He could do an invisible abacus to recall it.