What should I memorize?

So you've learned some basic mnemonic techniques like the method of loci, the link system, and the wardrobe system. Having learned the how, though, you immediately encounter the question of what: What should you memorize?

Right away certain things come to mind, most of them mnemonic challenges we encountered in school: memorizing the U.S. presidents, memorizing the fifty U.S. states and their capitals, memorizing the countries of the world and their capitals. These challenges are perfectly suited to mnemonics, comprising simple lists of information that can be placed along a mnemonic journey or linked to a list of peg words.

And these, naturally, were the first things I memorized or am still memorizing. However, I also noticed that finding this information in a simple, printable format was surprisingly difficult. So I have set about correcting this deficit by creating exactly such lists in Google Docs. Here enjoy:

Countries and capitals of the world printable list

U.S. states and capitals printable list

U.S. presidents printable list