Psion
Adventurer
Garnfellow said:(The method is really geared for writers preparing NPC statblocks for professional submission, rather than use by at-home DMs. I really only recommend this method for freelancers, WotC staff, and seriously anal-retentive types.)
One thing I do do is track where every skill point came from. Got that habit from the Jamis Buck NPCGen -- it was essential for tweaking the stats.