RE: How do you stay warm?
If the temps are really starting to plummet, here is my layering regimin.
Under Armor Cold Gear top and bottom.
Polartec Classic 200 fleece
Rocky heavy weight fleece vest
Cabelas Windsheir Wool Fatique sweater
Grey Wolf Woolens Wolfskin jacket with thinsulate and Wind barrier.
Under Armor Cold Gear balaclava hood
Good warm hat
I can hunt comfortably down to about 10-15 degrees in this setup.
Perhaps the most important thing you can do is make sure your head, neck and kidneys are warm. If you don't have a good warm hat on your head, you're not going to last very long. Most heat escapes there.
The best peice of clothing I've bought is that Cabelas Wool sweater. That thing can get downright warm if its anywhere above 50 degrees. Next is the vest. Adds to the core warms but doesn't add bulk to my arms.