Why it works
You can walk through your childhood home in your head right now, room by room, without effort, and you have not practised doing so once. You cannot recall twelve arbitrary items in order after ten minutes of trying. Spatial and episodic memory are simply built better than rote list memory, and the memory palace is a way of laundering the second kind of information into the first.
Building one
- 1
Pick a route you know cold
Your flat, your walk to campus, your grandmother's house. It must be somewhere you can already move through without inventing anything.
- 2
Fix the stations, in a definite order
Front door, coat hook, kitchen table, fridge, window. Ten to twenty. Always the same order, always the same direction — a route you sometimes reverse is a route you will get lost in.
- 3
Place one item at each station — violently
This is the rule that decides whether it works. A neat mental note of 'cranial nerve I: olfactory' at the front door will evaporate. A door that is *made of enormous twitching nostrils* will not. Bizarre, moving, exaggerated, rude, loud. Politeness is the enemy of memory.
- 4
Walk it, in your head, from the door
Three times today, once tomorrow, once next week. Then let spaced repetition take over.
What it's for, and what it isn't
It is superb for ordered lists of arbitrary things: cranial nerves, the branches of an artery, the stages of a cycle, a sequence of cases, the order of the Krebs cycle. Anything where the content is fixed, the order matters, and understanding will not help you because there is nothing to understand.
It is close to useless for conceptual material, and reaching for it there is a common trap. You cannot build a palace for "why the reaction is exothermic" — and if you try, you will produce a vivid image attached to a fact you still do not understand. Understand first. Mnemonics are a delivery mechanism, not a substitute.