Fraser Speirs has blogged his experience keywording his photos:

So, finally, I’ve drawn together my thoughts about keywording in Aperture. My problem with keywording has always been more about “how can I make it easy enough that I will actually do it?”, rather than “what should the keywords be?”. I’ll explain my personal taste for both, though.

In particular he talks at length about the keyword bar at the bottom of the window:

The magic — if that’s what it is — is that these button sets give keyboard shortcuts to your keywords. The first nine keywords in any set get the shortcuts Option-1 through Option-9, although the set of keywords can be arbitrarily large (I think). The second insight, that I think few people have noticed, is that you can cycle through these button groups using the shortcuts Comma and Period. This makes for really fast navigation through keyword groups.

Tags: Aperture, Keywords, Workflow