Once, very briefly, I worked in publishing. I learned a lot in that short time, and I learned things that have come in handy in most of my subsequent jobs. (I have also briefly worked in museums, in software, in ice cream, and in men's pants, and the knowledge that I gained in each of those venues has had unexpected applications later in life. For example, I can still estimate a man's inseam at 25 paces.)
In my capacity as an Editorial Assistant, I had occasion to sit in on those production meetings that were really budget meetings, during which line items like color, paper, coatings, die-cuts, and binding options were discussed with a sometimes brutal disregard for the needs of the content. Those meetings would make a grown man weak in the knees.