Macworld goes undercover to reveal 40+ Mac OS X 10.3 Tips and Tricks
here. Elsewhere, if you work in an environment where you need to manage a large number of Macs (such as in a classroom), you
might want to take a look at Apple's Remote Desktop. Using this pricy but effective software, you can easily control and manage all of the Macs on the network. Also, MacOSRumors
details some of the planned features and marketing points for Mac OS X 10.4 (preliminary code-name "Merlot").