Instead of using Photoshop, why not give Apple's Aperture a try? Aperture is designed more for post-production work for professional photographers, letting you cull through shoots, enhance images, manage massive libraries, and deliver stunning photos.
Watch this video tutorial on how to manage photos in Aperture. After a shoot, it's not uncommon to have to sort through hundreds, if not thousands of images in order to make your selects. With Aperture's unrivaled photo management tools, you can manage this process with ease. Sort, stack and compare thousands of images.