Google just rolled out some new ways to refine your search results that are pretty useful. Here’s the announcement http://googleblog.blogspot.com/2009/05/more-search-options-and-other-updates.html but it’s easier to just try it.
Google something and then click the “Show options…” link at the top of the results. Now you can refine your search. For example, you can select what types of pages you want to see (reviews, news, etc). If you choose one of the time limits, you can then sort the results chronologically instead of by relevance. Neat! The timeline and “wonderwheel” are very interesting, too. Happy searching!