Here's today list to shoot snowy landscapes:
- Broad day light is not so bad! It mixes pretty well with the white candid scenics and is quite iconic. No need to shoot at sunset.
- Keep your palette minimal: whites, blues, greens, that's it. Don't go all christmas tree with it. Keep it simple.
- Copy space. Lots of it. Against blue. Again, keep the composition simple, allow space for text and off you go: you have a potential seller
- The lonely tree. This is one of the most hit compositions in history of photography, but it's still a good one if you can pull off some good light, interesting composition and, again, lots of copy space.
- Expose to the right. A lot. The metering system of the DSLR will try to expose white snow to middle gray. You want to over expose your image to make sure white snow is, indeed, white. Be careful to not burn highlights.