I keep forgetting to add this link to my Resources pages, and I’m definitely late to this particular party, but Google has an excellent set of Webmaster Tools that let you see what the Google search engine sees when it visits your site or your clients’ site, then tweak your site information. You’ll need a GMail account to login but that’s easy to get as part of registering for these tools.
I’ll also look to see if Yahoo! search has a similar toolkit.
URLs:
http://www.google.com/webmasters/tools/
