I have my playlists organized by "type" of music, in the way that I classify my own collection. The sublists are then band name, and under those - album year and name. If I'm not sure which band I want to listen to, I just shuffle one of the top playlists ("types").

Also, if you've been careful or specific about tagging your mp3s with a limited number of genres in the genre field if the ID3 tag, then you can have the empeg search and create a playlist for you using that field.

Edit: Well, now that I have seen the picture, I think you are looking for something more like Tweak Order By Artist. This is covered somewhere in the FAQ. You may even be able to find it by searching for that exact term.