>Using reverb and compression

Some vocalists prefer to have compression on their vocals as they’re recording, to tame their dynamic range and enable them to hear every nuance clearly. The same is also true for reverb, which will help a performance sound more natural. This is fine, but don’t add too much of either as it’ll adversely affect pitching, and never apply any such effects to the actual signal that’s being recorded (that is, via hardware processors or your soundcard), or you won’t be able to change things later on if you overdo it. Instead, place a plugin on the audio track itself, which can then be removed after recording.