Does your snow photos have a grey tint or lack detail? If so, that is because built-in camera meters are calibrated to see the world as neutral gray.
When shooting photos in the snow, use The Sunny 16 Rule. This is a way to meter for correct exposure during daylight without using the camera’s meter.
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Simulate a Lomo Camera Effect using Photoshop CS5
Simulate a quick Lomo camera effect using Photoshop CS5 lens correction filter and channel adjustments.
Simulate a Holga Camera Effect using Photoshop CS5
Simulate a quick Holga Camera Effect using Photoshop CS5 lens correction, high-pass and blur filters, curves and black & white adjustment layers.