If you are recording on your phone, MAKE SURE TO TURN IT SIDEWAYS for HORIZONAL ORIENTATION.
Use a neutral backdrop. A wall works best. Keep it simple and clutter free.
Find a quiet room. Turn the TV and radio off. Silence your phone. Shut the door to keep young kids and pets out. Shut the window to eliminate street noise, sirens and alarms.
Use natural light if possible. Do not use overhead lighting (lamps) – it creates shadows under your eyes. Put any desk or clip lights a little above eye level on either side of the camera.