Way back in 1976, ABBA sang, "Knowing Me, Knowing You." The song was about a breakup, but the title phrase notes a good way to approach negotiations. Knowing the personalities of the involved parties, and how they would potentially mesh (or not), is extremely helpful. So, in this lesson, we'll use the DISC personality model, and go through each type. You'll learn its common characteristics and behaviors, and what types harmonize with it best.