I want to point out that actually we are (subconsciously) using TM when we are theming different things:
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Adding themes in the memory palace
You can reuse your palaces by adding different theme to the palace each time you reuse it. There could be an ocean theme, yellow-flower theme, mushroom theme, etc. What you are actually doing is transforming loci: you usually don’t change their shape, but you add a new color and material to their surface layer.
(mirror-chair example) (or more exactly alternative 3.2 from my algorithm) -
Theming your peg list
I have 00-99 peg list which I reuse constantly (in my memory palaces), often when reuse them I add a new theme for the pegs. I transform them just like loci in the example above. For example, I attach a peg for each episode of Mentalist, and this set of peg has fly amanita (a mushroom) theme. Now I can recall the episodes numerically (e.g. What was the 99th episode? My 99 peg - butterfly. Now I see a red white-dotted botterfly which has soft white fungi body. I have used this butterfly only once - this was in episode where P.Jane released it into the house of fake kidnapper, he ate it and got food poisoning).