If you want to focus on productivity features:

• See Automate repetitive tasks for an overview of the Photoshop and ImageReady productivity tools.
• See Using the File Browser (Photoshop) to learn how to locate and organize images easily, and how to manage files and folders.
• See About data-driven graphics to learn how to produce variable designs such as Web banners or catalog pages automatically.
• See Using the Rollovers palette to see how easy it is to get instant access to all document states.
• See Managing files with WebDAV (Photoshop) to learn about the asset management features in Photoshop.