When people try to do black hat things (for those that don't know better)... would stay away from hidden text... and overkill repeatative keywords...
keyword density too high. The first site that I began doing serious optimization too was at first targeting only 1 specific key phrase. keyword density was near 8%. This worked very well in Yahoo, but I was 10 pages back in Google. I then began to target a 2nd related phrase. Replaced some ocurrences of phrase 1 with phrase 2 in the index page content. This reduced the density of phrase 1. Site started to climb more in Google for phrase 1. Began getting more backlinks with phase 2 in anchor text. Site now ranks much better in google for phrase 1 and getting higher in phrase 2. Placement in Yahoo is still in top 10 for phrase 1. Google likes to see various versions of realted key phrases. Not just a bunch of the exact same phrase. For example. Pretend this is your 3 word keyphrase= big fuzzy keyword you would of course use this exact phrase in title tag, file name , and h1 title text. In body of content you would write things like: ...a keyword that is big and fuzzy... ...the fuzzy keyword is very big... We all like our keywords to be fuzzy. Especialy the biggest ones.... This of course makes it difficult to determine a keyphrase density because the phrase is often split up with other words in between. Just make sure you dont end up making the density of individual words in the phrase to high. A keyword density tool may tell you your density for big fuzzy keyword is only 3% but you probably don't want the density for fuzzy to be 10% And to mix it up a bit with related keyphrases you can add a few similar ones like furry keywords, or little hairless keywords
If you're going to spam, then spam...but dont build links to your own "quality" site from spam sites...
Great post axemedia... I feel bad for the little hairless keyword guys... maybe we can get the some Rogaine or hook them up with Sy Sperling (not just the president)...