Try setting the camera in Manual mode, and playing around with the different functions like the Exposure value, white balance, and the "My Colors" feature that comes with the Canon cameras. Composition's pretty good, and if you can, try turning on the gridlines on you screen. And where each of the lines intersect, at least one of those points would be the strongest part of your image. It'll definitely help in creating eye pleasing images. Your pictures look great, I wish we had snow here so I could take those types of images myself!
