Did you know that in most Mac browsers you don’t need to bother typing the “www” or the “.com” in URLs? For instance, if you’re going to Apple’s site, just type “apple” in the address field and hit return. Your browser will add the rest for you. This even works for other sections within a site, for example, to visit Apple’s support site, just type apple/support. Your browser is smart enough to place the .com before the /.
This, and other surfing tips can be found in this article on Macworld.