Lessons from "The Apprentice": the dynamics of leading a project. If you win, it can cover up bad process/bad leadership; if you lose, people blame the person they like least and rationalize reasons.
Lessons from "Nathan for You": outside the box thinking and pushing on rules until they are just about to break spurs innovative and creative thinking, it's mostly garbage ideas but there are gems. Even the garbage can be interesting because people are so used to companies following existing playbooks and being safe.
Lessons from "Shark Tank": desirable companies are in a position to reverse interview investors, basic heuristics for company valuation, financial metrics (COGS, CAC, etc), the difference between products and companies