Read this article from Siblu.ca

“Many new users and even those with more experience of the net will make mistakes when they are starting out in the process of boosting their site so that it ranks more highly in the search engines. The biggest mistake many of us make is listening to unfounded advice, going with the latest rumours circulating online or simply going with our instincts to our detriment. Have you ever fallen in the trap of making changes to site layout, content or backlinks only to fall in the ranks without being able to identify exactly why you were ’supposed’ to change in the first place? “