I usually wear under amour with fleece lined, winter breeches on top and then an under amour long sleeve top with a t-shirt on top. I stick a fleece on top of that and then a big jacket. I also wear ariat winter paddock boots and I put regular half chaps over those. And of course, winter riding gloves. They keep my hands warm without being too bulky It's still in the low 30's here so I usually have take of the top jacket or I start to sweat... It's actually mostly been the wind that's bad, but it's been calm the last few days.
When it get really cold I have coveralls, which I can and will ride in.