Think warm thoughts
Heat bars and heat lamps
Heated towel bars in the bathroom add warmth and do double duty by keeping towels warm in winter and drying them in summer. Heat levels can be adjusted on some models and boosted in the cooler months. Buy a heat lamp for the bathroom that can be mounted as a separate unit or replace the existing ceiling light.
Use heavier textured fabrics such as chenilles, cotton and wool mixes for sofas and chairs. A misconception is that wool is 'hot'; it can keep you warm in the winter and cool in the summer. It all depends on the quality of the wool and the weave.
Wallpaper can create a cosy atmosphere as well as not being cold to the touch. An accent wall here or there, behind the sofa or headboard, can make all the difference.
Large accent throws over chairs and sofas are good for winter. Try chenille, wool, fleece, faux fur or sheepskin.
It's not about the colours, but their undertones. Grey can appear cool with a blue or green undertone, but with yellow or red it appears warm.