So true, what you say about the value of professional training. Family and friends often do indeed pass on bad habits--coupled with over-confidence in their own skills. Of course, as a driver ed instructor, I'm a bit biased about this particular point!
My students often overlook those non-obvious lane changes as well. We teach that pulling over to the curb to park is a lane change--from the traffic lane to the parking lane. Merging lanes are a lane change as well, in many cases. And for any lane change, the student driver is expected to do a complete MSMOG. This is a handy mnemonic we use to help students remember: Mirror, Signal, Mirror, Over-the-shoulder, Go if safe.
What advice would you give our readers about dealing with the DMV, in general? What's it like from your perspective on the other side of the counter, so to speak, to serve your customers at the DMV?