In the winter time, it is a good to have a set of warm flannel sheets and perhaps either extra blankets or even a bed cover that is thick and warm. As the season turns to spring and summer, the house naturally gets hotter so it is time to change out the sheets and bed cover. Light cotton sheets can keep you cooler at night and perhaps a lighter bed cover is better in case it gets a little cooler.
Having a different thickness of bedding and different styles of sheets will not only make you more comfortable sleeping, but can also save on energy costs by keeping you cooler in the summer and warmer in the winter.
Here is a great video from AOL On Home on swapping out the bedding depending on the season.