So I made this piece for a contest in the AllArt-R-Us group on deviantArt. I had a little trouble superimposing the images, so constructive criticism would be nice. I'm not sure how to insert images either, so I just put in this link.

Pretty good mash-up of images. I would work on matching up your perspectives and cleaning up the edges of the trees and fur on the coat so you don't have to cover it up with a glow.

I think you added the lens flare which is a pretty sweet addition.

lol, i was hoping nobody would notice that glow. 
ya, i had a bunch of trouble trying to get the right coloring. I probably had 5 adjustment layers on the girl and i played with the curves for about 10mins, but then I just got really annoyed. The trees were making me mad too. lol.
I actually didn't add that lens flare, it was already in the image, which worked out great. I ended up winning the contest tho so thats good. 

In my opinion, I think this is a good mash of images with lots of meaning. Great work keep it up!