How do I migrate my information to a new Macintosh?

First, the brick & mortar Apple Stores will offer to migrate your data for free, if the new system is purchased from them, the main hassel is the wait, and bringing in the old system.

Alternatively, on the new system, as soon as it is booted will offer to migrate the old computers data. All you would need is one of the following an ethernet cable, Wireless network, or a Firewire cable.

see http://support.apple.com/kb/HT3322

To use Migration Assistant, both Macs must be FireWire-equipped or be connected to the same Ethernet or wireless network.

Tip: If you have a MacBook Air or MacBook (13-inch, Aluminum, Late 2008), make sure both computers are connected to the same Ethernet or wireless network. See this article.

Note: If you experienced issues while using some files or applications on your previous computer, you may not want to transfer those files and applications to your new computer. If you do, you may transfer issues or incompatible files.

To transfer files via Migration Assistant Before performing migration, use Software Update on your older Mac to ensure you get the latest updates for Mac OS X. If you’re using a portable Mac, make sure the power cable is connected. On your new Mac, open Migration Assistant, located in the Utilities folder in your Applications folder. Read the Introduction screen, then click Continue. If a dialog appears, type your admin password, then click OK. In the Migration Method screen, select “From another Mac,” then click Continue. If you are using FireWire, connect a FireWire cable between your new Mac and your earlier Mac, then click Continue. If you are using a wireless network, click “Use Network to transfer files and important settings over a wireless network”, then click Continue.

Follow the instructions in Migration Assistant to restart your earlier Mac if necessary. Select the hard disk and user accounts from which you want to transfer, and select whether you want to transfer applications, files and folders, or your Library folder. Note: When you first open a transferred application on your new computer, you may need to re-enter the application’s serial number or registration code.

Select whether you want to use your old network, time zone, and Sharing settings, and then click Transfer. When Migration Assistant is finished transferring files, click Quit.