I put my mp3 files into my computer's  /audio/music and /audio/spokenword folders. I often have my iPod away from my computer. This means that when I get my iPod to my computer, I often forget what mp3 files I've added to my computer but that aren't on my iPod yet.
(This is my vision:) I would like gtkpod to automatically these media files to my iPod when I click "Save Changes" (in gtkpod).

Is this possible? If not, what is the best way to do what I want to accomplish?

Thank you.