Start your VT with the best picture you have.
Make sure the lighting isn’t over exposed and your interviewee isn’t stood in front of direct light (i.e. windows). Light should come from specific sources.
Establish white balance in the exact location of where the interview will take place.
With a sit down interview, always use a tripod. However, it is usually better to have your interviewee standing.
Never interview someone with a desk between you or put the camera on auto. Adjust the iris to put focus on their eyes.
The best cutaways you can have are sequences. (Make sure they are relevant).
Hold a shot for five seconds as an absolute minimum. To steady yourself, hold the camera to your shoulder, feet steady.
In a sequence you should shoot five different angles (even if you only use three).
In a cutaway leave in the natural sound, just lower the sound level.
Interview people where they are confident (doing their job).