It's been so frickin' cold in our apartment since the temperature started hanging out in the mid 20's, that we went online to buy new flannel sheets last night. Turns out it's a great time to buy bedding, as many of the shops have it on sale.
The only problem is that many colors and sizes are out of stock. Nevertheless, there's good stuff and the prices are low. Here are links to the sale sections at all the places we looked: