Drive-by linkage post
By way of
vom_marlowe I found this very useful tutorial on improving Photoshop performance:
Getting the most out of your RAM
I followed several of the suggestions, and as a result Photoshop is suddenly running much, much faster. (I worked with it for hours today, and not once did I feel the urge to kick my computer.)
Getting the most out of your RAM
I followed several of the suggestions, and as a result Photoshop is suddenly running much, much faster. (I worked with it for hours today, and not once did I feel the urge to kick my computer.)

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Working like this, now this is downright fun. Before, I wasn't really inclined to try out anything new at all - trial and error is just no fun when an error can cost you another 10 seconds of wasted time.