Make sure you dress warmly if the weather dictates. The fastest way to end your hunt is to get unbearably cold and/or wet. Remember that what feels comfortably warm when walking around will feel at least 20 degrees colder when you're sitting. Use the wind to your advantage whenever possible. The "scent killer" sprays seem to work ok, but it's best if the deer don't smell you at all. You don't need to spends hundreds on the "scent lock" lined clothes either. That stuff, IMO, is just a gimmick meant to sell very expensive clothes.

Mike