Most of you already know this, but I though it was worth mentioning considering the recent snow fall on the eastern coast.
Most backpacking pots are made of very thin metal in order to reduce weight. If you just pack one full with snow, and place it on the stove or fire, there is a chance that it will get scorched because the heat will be transmitted so quickly that the snow will sublimate rather than melt. In order to prevent that, put enough water in the pot to cover the bottom, before adding the snow. If you don’t have any water with you, melt some snow in your hands or over the fire.