I am pretty sure I am not the only one with the following problem: every time I need to uncompress a file in *nix I can't remember all the switches, and end up googling it, which is surprizing considering how often I need to do this.

Do you have a good compression cheat sheet? Or how about a mnemonic for all those nasty switches in tar?

I am making this article a wiki so that we can create a nice cheat sheet here.

Oh, and about man pages: is there's one thing they are not helpful for, it's for figuring out how to uncompress a file.