Once the clocks go back, a few small changes make a room feel warmer. Better light, more texture and somewhere soft to sit. You probably own half of it already.

Turn the big light off
Overhead lights flatten a room. Use two or three lamps at different heights instead, with warm bulbs of around 2700K. Candles are nice, but lamps do most of the work.
Layer the textures
Mix materials: a wool throw on the sofa, a sheepskin or rug on the floor, linen cushions, a wooden table. A few different textures in one corner make a room feel warm before the heating's even on.
Keep a throw where you sit
Leave one over the arm of the sofa, not folded away in a cupboard. A British wool throw in oatmeal works with most colour schemes. If you'd like more colour, try the Royal Stewart tartan.
Warm the colours up
You don't need to repaint. Swap a couple of cushion covers for oatmeal, rust or deep green, and bring in wood, wool and dried flowers.
Make a reading corner
One chair, one lamp, a side table for a mug and a blanket within reach. It'll become the most used spot in the house.