Set up a boom microphone stand in a small, isolated room lined with acoustic tile or foam, no bigger than 8-by-8 feet, to achieve a dry recording and limit the singer's mobility.
Attach a microphone with a shock mount to the boom stand.
Adjust the main microphone pole to as high as it can get.
Angle the boom and microphone down so the singer cannot comfortably touch the microphone stand while singing.
Encourage the singer to maintain an 8- to 12-inch distance from the microphone at all times.
Increase the volume of drums in the headphones to help the vocalist stay in time, whether recording live or to preexisting tracks. If there are no drums or percussion on the track, increase the volume of the metronome.
Maintain vigilance on the fader while the vocals are being recorded to ensure the vocals are not too quiet or peaking.
Listen closely to the vocals to ensure the recording levels are consistent.
Ensure that the vocal track being used for the mix does not peak. Be mindful of distortion.
Isolate the vocals continually while mixing with the backing tracks, to listen for unwanted vocal noise or distortion that may be covered up or hidden by the other instruments.