I've just seen this wonderful graphic showing the factors which influence your search engine ranking with an indication of how each is weighted (and which ones work against you).
For the large version complete with lots of explanation.
Scrutiny will be able to help you with many of these things.
I welcome relevant comments but there's a plague of self-promotional and sometimes barely-relevant comments including link to a website url with carefully-chosen link text. These will be treated as spam and removed immediately.ReplyDelete