From Running on Sand to Running in Snow

So I am way used to running in the sand, but I am currently in the air (free wifi from Delta, woot woot) on my way from West Palm Beach to the Berkshires in Massachusetts, so it looks like I am going to get some running in the snow. Sounds like fun to me. 85 degrees and humid to 30 degrees and icy. Hoping to avoid injuries and anxious for those burning lungs and runny nose!