Now is the season for socks. These socks are called "raggsockor" in Swedish and I have knitted them since I was a child. The model is very simple, and you can mix colours and use left-over yarns.
I find it very relaxing to spend evenings knitting these socks. Since the model is very basic you can knit while chatting, listening to music, watching TV and so on, without having to worry about getting distracted.