I'm slowly learning that despite how much more money I've earned by skipping between companies, skipping is not a path to knowledge. It provides better earning opportunities (to a point), it provides new challenges on a regular basis, but I've lost the ability to go deep into a topic. The depth that can't be achieved in two or three years.
I guess I'd really like to see a bit more ink spilled on "congratulations, you got a job; now what?" What interpersonal skills are most important? What are good resources for continued learning? What do C level people actually do? How can I help the company succeed? What career opportunities are possible for me without having to skip jobs? What can I learn from this company before I go to create my own?
That would be much more valuable, IMO, than a primer on how to pass an interview process.