A few quick tips

Here are a few things I learned from my backpacking trips this winter:

• Bring a fire starter (magnesium sparker) if you have a JetBoil stove.  Sometimes the built in starter breaks, or doesn't light in high winds.  With the sparker, it takes one swipe and it will start every time.
• If you are using an inflatable air mattress in winter, the air will become cool during the night and you will freeze.  I have learned to use another layer between the bottom of the tent and the sleeping pad.  Either a lightweight foam pad, or other clothing layers that aren't being used will work.
• Save your filter by pre-filtering overly dirty water.  Use a bandana or a t-shirt.  I use a Packtowl along with a Steripen pre-filter.  Both are extremely light alternatives, and along with some sort of chemical (AquaMira) can save you in a pinch.
• Sleeping bag liners are very comfortable to sleep in, but I am not convinced that they add any additional heat.
• Those re-useable hand warmers are awesome.  I slept with one by my feet, and used another to melt about .5 liters of water over night.
• Be careful using water filters in winter, as they might freeze.  If it is supposed to get below freezing, put the filter in your sleeping bag.
• When melting snow for water, don't forget to cover the pot.  Any sparks could get in your water, and the whole bottle will taste like charcoal.