Thanks ! I used Adobe Photoshop also. I used to do manipulations, so I am really good at doing realistic hair . Making it look 'cartooney' (Is that a words ? Lol ) was difficult . I am working on my second one right now (: What I'm having trouble on right now is basic shading .. I'm not very good at it .
I've never had any real eye for manipulating photos, haha. Most I do is make basic edits to bring out the color and such.
There are oodles of tutorials on deviantART for tags and shading them. I always zoom in as much as possible (1600%) for my line art (which I use the pencil tool for). Then I zoom out to about 600% for my shading (after I have the base colored). I always shade grayscale... as you can see below.
From there you basically re-color the base (the medium gray), and tinker with the shading and highlight layers' opacity and layer setting (multiply, overlay, etc.) to make it look more natural. I put one of the color-overs next to the grayscale so you can see. :)
Most of the "tags" are kept at 150x150 pixels in size. Others go up to 600x600 pixels.