Heres my setup...

Cold weather 40 and below

Top
First Layer- Under Armour short sleeve
Second Layer- polypropylene long sleve
Third Layer- Fleece sweater, or if temps are really low, a wool sweater
Fourth Layer- Outer Layer, Scent Lok Full Season Savanah Jacket

Bottom
FirstLayer- Polypropylene pants
Second Layer- Fleece pants
Outer Layer- Scent Lok Full Season Savanah Pants

When the temps are warmer, usually I'll just wear the polypropylene layers and the outer layer of Scent Lok gear, but bring some extra clothes just in case.