Make sure to feed birds and give them water on a regular basis. Nuts, seeds and bread crumbs are all great choices.
Keep your houseplants away from sources of heat in your house such as radiators and water regularly.
During the winter months you should water your houseplants sparingly, otherwise you might promote rot.
Drain everything in your garden of water that might be damaged by sudden frosts.
Use nets to cover up ponds, this will prevent leaves and other things from polluting the water.
Continue to water and deadhead hanging baskets but stop feeding them.