All web presences change. Haphazard change results in a site that is difficult for the visitors to use and owners to maintain. Your website, intranet, or extranet needs focus, and pulling this off requires product thinking.
David Hobbs brings a lot of good example to the web pizza or frankensite problem. He has a good range of tested ideas and useful analogies and metaphors to help you and others in your organisation the challenge of presenting a fluid, useful, and continuing program of improvement for your org's web presence. He shows how short term fixes end up being long term issues. Highly recommended