Mastermind: a board game, a Marvel villain, and a business group. The business option may sound like the least interesting definition of the three, but a Mastermind group can change your sales game drastically. By gathering people with similar goals but different experiences, salespeople learn from each other.  Benefits of a Mastermind Group Learn From the Best At its core, Mastermind groups allow you to hear the best experiences that netted the best results from your peers. You’ll spend part…