While leadership is best described as an art that takes years of practice, trial, and error to improve, it also requires an important mathematical technique: addition. Every stage in your development as a leader requires you to master certain skills and avoid various pitfalls. A productive and selfless senior leader is someone who is able to build upon their skills at every level but also retain the previous lessons they learned. Let’s “add up” some techniques, lessons, and ideas that make leaders respected, emulated, and successful.