Microsoft Office Discussion Groups is a great resource for any questions you may have about working with PowerPoint, Excel, Word, Outlook and other Microsoft Office products. It’s the place to go when you’ve finally thrown in the towel and conceded defeat, or just want to get more familiar with techniques and procedures.

http://www.microsoft.com/office/community/en-us/default.mspx 
You can ask questions and get answers directly from power users, developers, and technology experts world-wide. Answers are usually posted within an hour, and often much sooner.  You can search for specific topics, read up on issues others are dealing with, exchange ideas and post your own tips and tricks.