I tend to eschew memory techniques. Often I find forgetting is a feature and not a bug - garbage collection of the memory system if you like: a sign that (given the current presentation) the data doesn't seem relevant enough to retain.
But as a child I was an avid reader and I scoured the libraries of my youth and naturally built up spatial memory maps for them.
I'm in my 40s now, but I still have a sense of where and in which library certain books and certain topics go.
Learning something is different than using a memorizing technique. The former is for understanding and the latter is for putting impractical information. However, we may utilize the techniques to speed up or enhance the learning process.
But as a child I was an avid reader and I scoured the libraries of my youth and naturally built up spatial memory maps for them.
I'm in my 40s now, but I still have a sense of where and in which library certain books and certain topics go.