Here are some useful resources suggested by members:
Word
Microsoft Word 2007 and 2010 for Law Professionals by Patricia Gordon. ISBN 978-0-615-34402-7
Microsoft Word 2007 and 2010 for law professionals: unveiling the rules and secrets of legal word processing / KAS Training and Development ISBN 978 0 615 34402 7
Excel
http://www.mrexcel.com/about.shtml
Outlook & Exchange
Office Blogs
Quick tips/tricks and free learning…