Tips and Tricks for HTML and CSS

CSS Formatter
http://csstypeset.com/
HTML Sandbox for testing
http://htmlsandbox.com/
CSS cheat

http://www.google.com/search?hl=en&q=css+cheat+sheet&btnG=Search
HTML Cheat
http://www.google.com/search?hl=en&q=html+cheat+sheet&btnG=Search
This Group standardizes all web standards
http://www.w3.org/ World Wide Web Consortium
MetaTags
http://www.google.com/search?hl=en&pwst=1&sa=X&oi=spell&resnu...
doctype
http://www.google.com/search?hl=en&q=doctype&btnG=Search
Add Images to backgrounds...
http://www.w3schools.com/css/css_background.asp