Since everyone else already told you "how to"... I'll add just this one thing....

Set up a folder, name it for the song, and send all the wave tracks to it. You can also use it to save the PG files (SGU & MGU) so that it's all in one place and easy to find again.

I typically set up a master folder with the year's date..... Songs 2016... for example and then save the individual song folders in it. It's certainly really easy to find any song I've ever worked on.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.