I'm just getting into using iPhoto for my best of the best pictures. I'm adding keywords for easy searching, but I'm starting to drive myself crazy trying to find a good keyword system for myself. Anyone else use iPhoto and keywords? What 'practices' do you use when keywording your photos? I have a few specific questions to get a better idea of how to do things, but I wanna see if we have some serious iPhoto users in the Mac crew.