Your reseller should be your first resource. They're supposed to know you,
your team, and the kind of work you do.
If they can't or won't provide, you should contact Mark Scacco with
Engineered Efficiency Inc. www.ee2inc.com His company teaches hands-on
training on your terms at your location. (Disclaimer: I've worked with and
for Mark.) Mark is teaching the resellers, I think that says enough about
his expertise.
K-Tek is another option.
If nothing else, go to the Autodesk Web site and check out the C3D basics
book and the Solution Series: Residential Grading book. This book focuses on
using C3D in production and solving a problem instead of working menu by
menu. It assumes a decent level of knowledge.
HTH,
James Wedding, P.E.
Jones & Boyd, Inc.
Dallas, TX