I keep a clothing log of the different stuff I wear at different temperatures. Over the years I've made adjustments, find out what works and what doesn't'. The winter forum here on BF has a lot of info on it. Practically everything I've learned, I've learned here on BF. Learning what other people wear. I'm always doing searches on a certain item to see who has it cheaper. I've saved a lot of $$ doing that. I'm starting my eighth winter with pretty much the same clothing I started with. Buy good stuff and it will last a long time.