Yes. Some people chain together small locations that in aggregate serve as a large palace
> Many bullet points per location?
At first I used the "roman room method" which put 10 items per room. Later, I store "memories within the memories" which is like zooming into a single item that itself serves as a mini-palace. For example, maybe Mr Rogers is in a room. I can zoom into him and he could have something on his head, in his mouth, on each hand, etc and he could store an additional 10 ideas.
> Very big memory palaces?
They are places I've been like houses with 5-10 rooms. I tried using the British Museum because it has google street view.
The key to memory is link ideas to what you already know well.
>do you memorise as you read, or do you take notes and learn those?
I've tried both. If it's a "concept book" then I read it once, take short short notes of only 3-5 bullet points per chapter, then memorize those at the end.
With "course/class/do-it" books where you're learning by doing and spending a long time with the book, I paper clip a folded sheet of paper in the book and do it on the fly.
> any guides that you found particularly useful?
I'll share some below. One point to share is that this is a skill (like bike riding). So studying the method (at first) is almost useless. Just try it, learn by doing. Answer your own questions by doing the experiments yourself. Start with memorizing something you actually care about. You will totally suck at first, and rapidly improve. :)
Links: