Take a moment to consider where your sofa is placed. Is it blocking a radiator? Even if it isn’t, creating more breathing space can help get more heat into a room.
Do some decorating
A nice rug with a good knot count can help trap warmth in a room, especially if you have cold wooden flooring. If you’re feeling creative, you could also try tapestries for the wall.
Use home comforts
Wrap up in your thickest jumper, pop a hot water bottle into your bed, and ensure regular hot drinks are close to hand. Even leaving bath water for 20 minutes after you get out can help.