Many similar questions here ask either about working or short-term memory, or about various tricks and techniques to efficiently remember information. My question is, is it possible to improve the capability for remembering long-term itself? So that learning/memorizing something would take less time or repetition, and the acquired knowledge/information will be stored for longer and with less distortions.
The effect might not be permanent, but it should be prolonged and substantial. To illustrate my point, let's assume for argument's sake that learning poems has the effect of improving long-term memory. This would mean that, after regularly memorizing new poems for several weeks, i find that i'm able to memorize new poems spending less time, the poems retain remembered for longer. I'm also able to remember content of non-fiction and fiction texts better too, so that i can recall tricky facts and logical inferences, which before memorizing poems i tended to forget. So, is there a method to improve the general efficiency of your long-term memory? In other words, ability to retain more information for longer periods with less effort?