53 CSS-Techniques You Couldn’t Live Without. CSS is important.
And it is being used more and more often. Cascading Style Sheets offer many advantages you don’t have in table-layouts - and first of all a strict separation between layout, or design of the page, and the information, presented on the page. Thus the design of pages can be easily changed, just replacing a css-file with another one. 247 web usability guidelines. Web usability guidelines Home page usability: 20 guidelines to evaluate the usability of home pages.
Task orientation: 44 guidelines to evaluate how well a web site supports the users tasks. Navigation and IA: 29 guidelines to evaluate navigation and information architecture. Forms and data entry: 23 guidelines to evaluate forms and data entry. Trust and credibility: 13 guidelines to evaluate trust and credibility.