In a way, a memory palace is an extravagant expenditure of time to develop. To that i have two things to say, it’s totally worth setting up as something to allow to develop through time. It’s easy once you get the hang of it. The easiest way, of course, is to have it installed by a professional so that it just starts growing itself - but in lieu of that, starting construction on your own is a great idea.

This is certainly not the least time intensive way to develop your memory but it may be the most comprehensive and certainly the most fun. Plus, it kicks ass as a way to develop your senses, your ability to hallucinate, and your various states of awareness.