Photoshop is an integral tool for the multimedia professional. I’ve included some useful links to sites and videos in this post that will help you get a better grasp of this massive program.
Click here for a site contains links to tons of Photoshop information.
This video is rather lengthy, but useful.
This link will take you to a bunch of really useful videos for Photoshop tutorials. I would recommend checking this link out, especially if you are a beginner or need some refreshers.
Rex's Multimedia Blog 