If you do much web searching, you are probably familiar with Google, the pre-eminent search engine. But there are many tips and tricks that can make Google work more efficiently for you, and there are a wealth of services offered at the Google site that aren't touted on that famously clean Google home page.
Google Guide (not officially affiliated with Google) offers many of those tips and search techniques that can yield better search results.
Google Earth is a downloadable application to assist you with mapping, satellite imagery, and other geographical queries.
Google's "more" links to a wealth of shopping, newsgroups, maps, and other services.
Some links courtesy of Sites and Soundbytes.