If you shoot video for long enough, and you’re interested in getting quality sound (you should be), then at some point you’re going to use a boomed shotgun mic. They’re not as easy to work with as you might first think, though. Bad technique can lead to the microphone picking up vibration and handling noise. It can also quickly get pretty tiring for the boom the boom operator, too.
In this video from Aputure, Ted Sim and Stephen Harrod provide six tips to work with boom poles on set. Some of the tips help to improve the audio quality. Others simply help you last for the duration of the shoot.