Before you start normalizing stuff make sure you are getting good hot levels to begin with as close to zero without going over. Normalize should be a last resort. Even if you have somewhat quite tracks go ahead and do your mix, then run the whole mix through some kind of limiting plug in. Ultramaximizer if you have it, or Wavehammer is pretty common. That will allow you to boost your signal and trim off the peaks. If you normalize yeah it will make it "louder" but when you normalize you retain your dynamics and so the points that go over zero sound like ass cuz they just get squared off, where as a limiter will compress them down and is much more musical.