Article: Look for a hot water bottle at your local drugstore. Most hot water bottles are made with a liquid that can be heated in a microwave. You can also use a more traditional hot water bottle that uses boiled water. Simply boil water on the stove and pour it into the hot water bottle. Place the hot water bottle under your sheets or a blanket, by your feet. It should stay warm all night long, warming your toes and your body. By morning, it will cool to a tepid temperature. Wool is a great material for insulation and retaining warmth. Your feet are often the first body part that starts to feel cold and due to poor circulation, you may have a hard time warming them up with just a blanket. Get several pairs of high wool socks and keep them by your bed. You may reach for them in the night, in the event you can't get warm. You may also want to invest in house slippers to keep your feet warm throughout the day. Look for thick slippers with rubber soles to keep your feet cozy and give you traction when walking around your home. A good way to stay warm at night is to move closer to your sleeping partner and reap the benefits of natural body heat. If you have a pet, you may consider allowing them to sleep in your bed, if only to keep you warm throughout the night. Drafts are openings between doors, window panes, and sometimes even the slates in your floors, that let cold air into your room. If you keep getting woken up by cold air in your room, check for any drafts by your door, your window panes, or in the corners of your room. Block these drafts with a rolled up blanket or a long pillow. This will help to prevent cool air from circulating in your room as you sleep. You can also hang long blankets over your door and your windows to prevent any cold air from outside from coming in through small cracks into your room. If you continue to wake up at night shivering due to the cold room, try layering your blankets over your sheets, alternating between a thin layer and a thick layer, to create more warmth. Down comforters are great for retaining heat and keeping you warm, as are wool blankets. Down sleeping bags, made for camping, will also keep you very warm throughout the night. Look for them at thrift stores, Goodwill, or camping stores.

What is a summary?
Use a hot water bottle. Put on wool socks. Use body heat. Block any drafts in your room. Layer your sheets and blankets.