Using Mac OS X on a laptop Mac, such as an iBook or PowerBook, isn't much different from using it on a desk-bound machine. The two primary tasks that are unique to mobile Macs are the following:
Managing your Mac's power
Configuring and using the trackpad
Although managing locations isn't unique to mobile Macs, you are more likely to need to switch among network configurations when using a PowerBook or iBook, so you should also understand how to use the Location Manager to make reconfiguring your Mac's network connections fast and easy.
The factor that makes a mobile Mac mobile is the capability to run it off battery power. This is obviously a good thing, but it also adds another ...