If you’re using Google Analytics and are new, learn both the basic and deeper functionality, such as creating advanced segmentation. It’s critical to understand your tool before you get into creating reports. Inevitably after making reports questions will arise asking for specifics, so you’ll want to know how to answer them. Smashing Magazine has a fleshed out guide to Google Analytics that will give you a crash course in the app.
http://www.toprankblog.com/2010/02/web-analytics-reporting/