It’s important to understand that a video has two components: picture and sound. Both need to be considered when recording, and flaws in either component can be extremely distracting for the viewer. One of the biggest mistakes amateur filmmakers commit is to put all of their effort into recording a nice-looking picture without putting any consideration towards the audio. Having a nice, clean audio track to go along with your picture is essential for creating a successful video.
Tip #1: Avoid generally noisy spaces
Tip #2: Use a high quality microphone
Tip #3: Eliminate background noise
Tip #4: Proper mic to mouth distance
Tip #5: Listen!
Your ears are the best tools to use to ensure you have recorded clean audio.