are your radiators free of furniture, clothes and towels? Remove the blocks so that they can work most efficiently to heat your rooms. Radiator reflectors placed behind your radiators will also help reflect heat into your room and mean you are heat the room and not the walls
cold patches on your radiators? Bleed your radiators to get rid of any air and make sure they heat up all of the surface area
zone your home - turn down the radiator valves in rooms you don't use very often - spare room and dining rooms are often underused and therefore don't need heating to the same temperature as the room you are working / spending time in
