Take ACAD Commands to the Limit
Autodesk's Jerry Bartels delivers a detailed exploration of uncommon uses for familiar AutoCAD commands and tools.
This video is part of the 30-Minute Workout series on the Civil Immersion site.
See the Jerry Bartels YouTube Channel.
and the Civil Immersion blog.
The raw and familiar AutoCAD you probably need to know but prehaps didn't ever think about.
In a word - Useful.