A lot of people give suggestions on how to improve your website or blog. Whether it is via SEO or design suggestions. Not many tell you what is going to destroy your website. I may be a little extreme but there are several pet peeves (as do many in the web design world) have that can truly turn your site from great to lame. There may be a couple of these that are straight forward but when dealing with clients it can become very obvious that some of their ideas on how a website should function are modeled after MySpace and the ilk.