This ties in with probably another one or two, but don't ever come home from a bad day at school or work and immediately start working on sabers while you're still in a bad mood. Additionally, especially when working on a more stressful part of a build, listen to some music while you build. It helps keep you calm when you're trying to thread that recharge port inside of a 1.1" ID hilt, or when trying to route 8 wires through a tube that fits exactly 8.