In my zone - 7b - I just get used to bringing anything I don't want to die inside for the winter. It's the way I plant in the spring. If I love it and want to keep it, it goes in a pot and comes inside. As a result I have what I call the "groaning table" (an old worktable) in my bedroom, covered completely with succulents, cape sundews and d. tokaiensis and d. aliciae on top of a small dresser, and more succulents in the kitchen window and on various tabletops throughout the house. The VFTs, d. intermedias, and pitchers are covered in several inches of pine needles in the mini-bogs outside.
In the last decade, we have had winters with 60+ degree Christmas and New Year's Days for several years running. The last three winters have been unusually harsh for us, with 11 inches of snowfall in 2012-13 and 4 inches of snow so far this winter. We have had single digit lows multiple nights in a row, and stretches of up to a week where the high never got out of the 20s.
In my garden, every winter is a crap shoot.