keep in mind, you do not need to normalize to 100%. You can always select a level less than the 100% normalize.
I would only normalize a track if there were no other ways to get it to set in the mix properly.
Instead of looking at the wave...listen to it. Now ask yourself if it sounds OK or is it in fact much too low to work with in the mix. If it is simply too low (bad recording job or whatever) try normalizing up but not to the 100% level. More than one time, a weak looking wave track sounded just fine in the mix. Depends a lot on the instrument and the genre. If it works with that low level weak looking wave, don't normalize it just to be normalizing it. You accomplish nothing. If you normalize it up, and then have to pull the faders down to compensate..... what have you accomplished?
Remember that normalizing will also raise the noise levels as well as the music. Giving the wave a small 25% bump up above it's current levels may be more than enough to do the job.
My goal in normalizing is as described above and the evidence to me that I did it right is that my faders are in the nominal range from -0 to -10 or so...... if I have to pull them down further, I probably normalized too much.
If I have to go above -0, I need to have another look at that track and figure out why I'm needing to run that high.
but that's just me and how I do it.