We've all heard the expression "You don't have to be a rocket scientist to be able to ...." Well, these Memoirs explain many aspects of what a rocket scientist does have to be able to do. The author, Dr. Mark Salita, has modeled a very wide range of phenomena in rocket chambers, nozzles, and plumes, as well as on the Shuttle launch pad and inside Minuteman ICBM silos. Dr. Salita is best known around the world for his modeling of O-ring erosion on Shuttle boosters, which he presented to NASA before the Challenger accident, and after to the Presidential Commission. His subsequent computer model of O-ring deformation and activation was the first of its kind, and was used to explain that the Challenger accident didn't happen simply due to the cold air (as described herein). That model has also been used for other aerospace applications, and by the nuclear power industry for their containment vessels. He is also well known for his innovative modeling of propellant ignition, slag generation in solid-propellant rocket motors, and vehicle staging. He also created the first model of gas-bag inflator operation, and his original 1985 model of moisture ingestion into gas bag inflators may explain the failure of Takata inflators in 2015. Recently, he has been modeling the Boost-Phase Intercept of enemy ICBMs from Unmanned Aerial Vehicles (UAVs, i.e. "Drones") using high-speed interceptors. Dr. Salita has been an invited lecturer at the Technion in Israel, ONERA in France, the Von Karman Institute in Belgium, Redstone Arsenal in Alabama, JPL and the Naval Air Warfare Center in California, Hill Air Force Base in Utah, and Orbital/ ATK in Chandler Arizona. The purpose of this memoir is to share his multitude of experiences in the rocket industry. It is meant to be entertaining and insightful for rocket colleagues, and for students or young engineers who want to know how one rocket scientist solved the many technical problems assigned to him. Many "lessons learned" are discussed. Recommendations are made about the process of problem solving in general.