RSS feed-finding Google hacklette: A quick way to find a blog’s RSS feed is to Google search the name of the blog and append your search with the words RSS feed. It works with other search engines – usually the second or third result, but with Google, it seems to be more deliberate.
(suggested by Tara Calishain)
Another tip is that most blog software standardizes the name of the feed. If the blog’s URL is http://blog.com/blog/ then look for: /blog/index.rdf or /blog/index.xml or /blog/atom.xml One of those usually works.