Check on older neighbours to ensure they have enough fuel and basics such as milk and bread. Older people can also play their part by keeping in telephone contact with each other and with their family and neighbours.
Dress correctly - wear layers, rather than one thick layer of clothing.
Remain active - don't stay sitting for long periods. Spread your chores throughout the day to keep moving. Exercise daily, but avoid risks in wet/icy conditions.
Eat well - sip hot drinks regularly. Consider keeping a flask of hot drink by the bed, in case you wake up cold.
Home - stock up on provisions in case there is icy weather and you cannot go out.