At http://en.wikipedia.org/wiki/Wikipedia:Cheatsheet (the current target of the "[[Editing help]]" link seen in edit-mode) we decided to exclude a few of those commands, such as ---- (horizontal line) because its use is deprecated, and ~~~ (3 tilde sig) because it is rarely used.
We also added instructions for <ref> tags, and ::talkpage-text-indents. Because they are (hopefully) used frequently.
Perhaps some of those changes might be useful in the pdf-cheatsheets?
-- Quiddity