I happened upon Cross-Site Request Forgery Prevention Cheat Sheet in my travels.
Check out commandlinefu.com! “commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.”
Oh wow, this is great: OWASP Cheat Sheet Series.
Learned a trick or two from this MySQL Cheat Sheet.