For organizing, I just do it like folder/directories on a winxp or linux box, add folders for year and work in progress:
2011
- balearic beats
- techo
- Funky house
2012
- Jan mix
Work In progress:
- Fashion show
- - Ambience
- - Day
- - Night
- competition
I put playlists into the year folder once its complete or I have played/mixed it, other stuff goes into Work in progress. I haven't started tagging stuff yet, not quite sure what you mean. Year and genre can be sorted in the list pane, then you can select all and copy to a playlist if you wanted?