Adobe Photoshop: Tip and Tricks (Official)
Creating layers, seamless patterns, beveled edges, wet paint, and good masking are just a few of the things you can learn to do at the official Photoshop site.
Photoshop Tips Page
This tips page is well-organized with a bounty of information and simple, easy-to-follow tutorials for making the Web a prettier place.
Andy's Photoshop Tips
Andy knows his stuff. Learn to make seamless backgrounds, beveled buttons, 3-D icons, and more. Free images, too.
Hands On Training by DocOzone
An excellent place to learn drop shadows, lighting effects, transparency, and more.
Photoshop Professional Tips and Tricks
Some good tutorials with start-to-finish examples.
Ticks on Trips
Photoshop "ticks" (tricks) with an attitude.
The National Association of Photoshop Users
If you join NAPP, here are just a few of the things you'll get: discounts on Photoshop-related software, plug-ins, and stock photography, access to a 24-Hour Photoshop online help desk, and invitations to conventions all over the world.