We make landings (hopefully) after every takeoff -- it's a reasonably simple process, once you learn how to do it right the first time, but there are some times when landings just don’t go the way we expect them to.
Insurance is what most pilots use to manage the risk of flying -- it's important for you and those you might meet with misfortune; it's just as important to know the fine print.
The majority of tachometers on the market are mechanical meters, which translate the engine RPM from a cable into a meter reading of how fast your engine in running -- and they don't always work right.