Take the CSS Leap - Great Link to CSS Resources.
What? You're using HTML tables to layout your website? You are sooooo behind the times! CSS (Cascading Style Sheets) first made their appearance back in 1996 and is currently neck and neck in terms of popularity with HTML-based Web coding. Using Cascading Style Sheets helps Web designers control fonts, layout and other design elements efficiently. Some of the advantages to using CSS include faster download times (BTW - check your website download times here), shorter development and maintenance time, improved accessibility, more elemental placement control (type and images) and YES - better search engine rankings. Why better search engine rankings? Search engine spiders can index more content (and hence less design code) which for many websites has resulted in higher page ranks.
Looking for a great resource to learn about CSS and its latest developments? Check out Veerle's Blog, a graphic/web designer living in Belgium who has assembled a great list of resources to help anyone learn the ropes of designing CSS based websites.