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.