Fond memories of having a handy cheatsheet printed out for doing homework and chatting on MSN Messenger, until of course I memorized them (or maybe I printed it for the benefit of others).

It was always odd to me that é was out of sequence:

  Alt+160 => á
  Alt+130 => é
  Alt+161 => í
  Alt+162 => ó
  Alt+163 => ú
  Alt+164 => ñ
  Alt+165 => Ñ

Most people with US keyboards had no idea how to type ñ/Ñ, the most important out of the bunch.