This are well written and very easy to follow. I especially like the interwoven strip tutorial in "Photo effects". The one below took me 1/2 hr or so which isn't bad considering I had never used a lot of the commands and tools before. I should have had its eye in the lighter section though. Poor horse is kind of a basket case!
http://www.photoshopessentials.com/photo-effects/
Basket Case
http://www.photoshopessentials.com/photo-effects/
Basket Case