If it freezes in your area, you could dig it up and store the bulb/tuber in dry peat moss or even newspaper in a dark, dry cool place where it doesn't freeze. Then replant it in the spring.
If it is in a pot you can keep it in its pot and just keep it sort of dry and overwinter in the garage or on the patio (if you dont have very cold temps).
If it is in the ground and doesn't typically freeze in your area, keep it dry and cover it with sheets if it happens to get too cold. This is more tricky cuz if it rains alot and gets cold they could rot. I usually do the pot method and put them in the garage. I have a few windows in my garage and I think it went only semi dormant.
It doesn't usually freeze here but last winter it sure did...
~SJN