It is an impressive ability to be able to remember whole books, lists of hundreds of words or a number with thousands of digits. But also being able to reliably retrieve names of people, dates of birth, vocabulary and passwords is an enormous advantage. So it is worth to learn about mnemonics in order to remember knowledge.
There is a bunch of methods, from small memory aids to comprehensive techniques with mental mailboxes and a memory palace.
To work intensively with these techniques and a finished training as Learning Coach for this subject was a well invested time.
Success is achieved quickly, it can be a lot of fun to learn even abstract knowledge and to remember it reliably, it feels good to appear safe and well prepared and finally it saves a lot of time, because information is no longer forgotten.