I'm struck by something here: Rands, you've climbed the big-company and startup-that-acts-like-a-big-company ladders somewhere out there towards the left coast in the technology field... as such, there are two more routes that you've missed:

* You start a business. Surprise, you're in charge of shit!

* You start, or get involved with, a "project." Surprise, you're in charge of shit! -- Or in this postmodern era, nobody might be in charge, but you still have to deal with people to accomplish anything.

Now, these sort of correlate to the existing categories you've proposed, but I do observe that people who don't realize they're "managing" are even less likely to acquire "management skills." Even though "management skills" are useful as regards dealing with people and making a living [or achieving whatever the success-metric is].

To look at it from another perspective, companies that are "corporate" enough to develop a "corporate culture" naturally acquire a "management culture" as one of those social constructs we create, like government, to ensure some sort of basic level of civility and shared purpose. At "small shops" you're far more likely to see "management" that has never acquired a skillset beyond screaming at people because there's no culture, and no other divisions, to integrate with. [The same goes for, say, FOSS projects, but most people aren't hanging their livelihoods directly on those, so when someone like Torvalds acts like a dick, it's just "refreshing;" there's really no reason at all for him to put up with anything he doesn't like.]

Anyhow, you're good at stating the obvious in ways that people will sit up and listen to, so I think there's a niche re: "Management Skills for People Who Don't Realize They're Managing." Or in other words, whether or not someone with executive authority intends to grow an entity, or make it at all 'corporate' or 'enterprisey' in structure, all the interpersonal tips and tricks still count. For those of us in those situations, any chance you can cough up something to make those screamers be more rational and less dicks? :)