
Have at least one hot meal a day alongside many hot drinks throughout. A little exercise every day will help keep you warm, try and get outside to do it, but if not no worries. Whenever you go outside always dress up warmly for once you do get cold it take lots to warm you up again. If you wearing several layers of thin clothing rather than a couple of thick materials clothing this is more effective for keeping warm.
The recommended temperature you should keep your home at is 21°C or 70°F. I don't know who has the right to tell you what the right temperature for your home is. This is a load of twaddle as far as I can see. Set your home to the temperature that you feel comfortable with, that surely is more sensible.
If you open the bedroom windows for around half and hour daily in the morning to air the room, then leave them securely shut all other times to keep the warmth in, this is a good system to have in place.

A little time to wait now and these tips needn't be used, but don't forget, winter comes around every year so don't forget to stay happy and warm next year as well.