I agree with this method. I have a list on paper. I write down a palace nickname (something short and unique that reminds me of the palace).
I also number them. I use the order that I write them on the paper. There’s relatively minimal thought going into that.
I do this for my “temporary storage” palaces.
I refer to it as “indexing”.
I haven’t quite figured out names for many of the longer term palaces I have memorized around my town because they’re tangled up and mixed together (in memorable ways).