jQuery 1.2 Cheat Sheet :: www.gscottolson.com/weblog/
A handy cheat sheet of jQuery methods to print out and keep on hand.
Tags: cheatsheet
How To Mix Fonts: Typeface Cheat Sheet
A cheat sheet for combining typefaces. No hard and fast rules but a handy guide to print out and use.
suda.co.uk/projects/microformats [Cheat Sheet]
Just in case you haven't seen Brian's microformats cheat sheet, here it is. Print and keep by your desk.
Cheat Sheets for the YUI Utilities ยป Yahoo! User Interface Blog
If you use the Yahoo JavaScript libraries a lot, these cheat sheets (inspired by those of fellow Brightonian, Dave Childs) should come in very handy.
PHP Cheat Sheet
A very handy list of common functions and parameters. Print it out and keep it on your desk.