Save time in the morning by melting snow the night before. Keep it from freezing by storing it in a snow fridge—just dig out a cubby and then seal it with a block of snow.
Going to the washroom: Always go to the washroom far from summer water sources to prevent contamination. Peeing is pretty straightforward—just cover the hole when you're done. For number two, saddle up next to a tree, dig a hole in the snow, do your business and then bury it. Trees put out a bit of heat, so your waste will disappear faster come spring. If you're camping with a group, think about building a communal snow outhouse to contain your impact. And keep in mind snow makes great TP—just ball it up like a snowball and wipe. Seriously.