If you have autodesk subscription / Autodesk University. Look for lesson: CR422-1 Introducing Navisworks Manage 2011
The white pages for this make a great Navisworks manual. There is an awesome webcast as well. This dude deserves a medal for bravery. The speaker is Matt Stachoni. This webcast covers it all. Period. I've even found that in his manual he has tips, tricks and workarounds. It is the most complete instruction I've seen thus far, but you need special access to get it.