Here is a great list of different cheat sheets that should help any beginner!
JavaScript Frameworks
Prototype 1.6.0.2 Cheat Sheet
mootools 1.2 cheat sheet
jQuery 1.3 Cheat Sheet
CSS
Mac OS X CSS Cheat Sheet
CSS Cheat Sheet (V2)
CSS CHEAT SHEET
XHTML
HTML/XHTML in one page
(X)HTML Elements and Attributes
Flash
Adobe Flash CS4 OS X Keyboard Shortcuts
Flash CS3 Cheat Sheet
Photoshop
Photoshop Lasso Tool Cheatsheet
Adobe Photoshop CS4 Keyboard Shortcuts
