a great Photoshop tutorial

I will soon get Photoshop CS5. Since I don't have a life here I just moved to, I thought I just could spend some time learning the different things so I'll learn quicker. I've tried it a little bit before, but I still don't know enough, roughly speaking. I know like different background effects, how to cut out a person, a little bit about layers and so on, but I think learning it from the bottom would be the best. Does anyone know a great Photoshop tutorial, perhaps a series of videos, teaching both the basic simple things, and the little more advanced things so I can make like a logo, website design, wallpapers, and cool things and effects?