Your preferred way to seperate Music from Audiobooks (etc)

Hi,

I have a bunch of MP3's which are effectively language learning tools. Currently they are just mingled in my list of MP3s so whenever I hit shuffle, I quite often get a random section of the language guide. I know there are some obvious ways to change this, such as making playlists, but I was wondering if others had elegant/interesting alternatives to solving this issue?

Cheers!

M