If you're as big a Google fan as I am, you can go to http://www.google.com/mac and your results will only be Macintosh related. Now there's no need to specify mac or macintosh in the query/input line.
[Editor's note: Google Mac has been listed here on the links page for a while, but I thought it was worth a mention in a hint -- you can eliminate many excess results if you're looking for Mac-specific information by using Google Mac.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20021212065758954