I just searched Maya Help and found some very useful info. You can create a visor tab and select type "disk". Then you can pick what directory you want to use.

I have a folder on my computer called Library-Objects and inside that folder, I have subfolders like Doors, Windows, Kitchen_Appliances, Automobiles, Trees, etc. So, I made my new Visor Tab point to Maya Library and now I can use that tab to import models/objects into my scenes as needed. (see screenshot). The only problem is it doesn't show me a picture representation of my objects so I'm going to look into how to go about doing that.