This post is applicable to those places where the climate is absolutely chilling – As for me, I live in a tropical climate where its already humid like hell.
Okay lets come back to the topic – the age old method to fight cold is to have a fireplace at your room or home – this was powered usually by wood or in some areas coal. Now a days the technology has gone up a bit – you can get electric fireplaces which does the same task but without the smoke and you can regulate the heat required according to your taste very easily.