A family of Microsoft word processing software products for creating web, email, and print documents.
All default styles and margins, some settings, and any "formatted" AutoCorrect entries you created are stored in the Normal.dotm template in your Templates folder (by default, %appdata%\Microsoft\Templates). Copying that file from one computer to the same location on the other computer will bring along all that information.
For plain text AutoCorrect entries, see http://support.microsoft.com/kb/926927.
If you saved custom Quick Parts, they may also be in Normal.dotm or may be in %appdata%\Microsoft\Document Building Blocks\Building Blocks.dotx, depending on what you chose in the Create New Building Block dialog at the time. If you aren't sure, just copy that file anyway.
Customizations of the Quick Access Toolbar are stored in C:\Users<your name>\AppData\Local\Microsoft\Office\*.qat (one for each Office program that has a customized toolbar).
The other customizations, such as the Ribbon color scheme, are stored in the registry and can't be copied directly from one computer to another.
You may want to read http://www.word.mvps.org/FAQs/General/FilesToBackup.htm and the pages it links to, but it hasn't been updated since Word 2003 and some things no longer apply. In particular, there is no Save My Settings wizard for 2007 or 2010 and the older one doesn't work with these versions.