Leave the master fader on 0dB, but pull all the other faders to the bottom before starting your mix. Bring what will be the loudest track (usually the kick drum in EDM) up so it’s peaking at about -11dB*. By doing this, you are mixing at lower levels, so as you bring the rest of the tracks up in the mix, the master fader should be peaking at around -6dB (important for mastering later on). You’ll probably need to turn up your audio interface to hear properly. *Remember, this number isn’t definitive…it will depend on the project.