Hi Ryan,
There are several ways to get the Loudness of each song equal. I do this in Adobe Audition. When a song is loaded into AU (Adobe Audition) then go to Effects->Amplitude and compression->Normalize (process), In the popup screen you can set the maximum of the loudness, I always set it to -1 db. Click apply and the track is selected and do the job for you. If you have a lot of tracks that you need to normalize then use the batch Process function(Under menu Window->Batch Process. If you do not see in the dropdown list your preferred settings you can make your own by recording the process you like. You can start a recording under Favorites->Start recording Favorite. When the recording is started, just do the steps on one track, when ready stop recording, give it a clear name and after that you will find your recording back in the drop down list of the Batch process. Hope this is helpfull for you. Have great recordings!
Greetings Paul