Warming in winter

Yes the old question! In itself it is clear – no full throttle – do not turn too high but also not too low But what is with short distances I drive often only 2-3 km and there is no engine warm! What is the best then? Just when I drive from work to home I only stand at the traffic light and then it tuckers warm but is not so good when it gets warm in the standing throttle I have heard! So I should always like to make it out or how and above all what? is the next thing. when it’s cold he jumps on worse. Should I then let him lurk until he’s on or would rather lie for a little while and then again that he’s on! Not that I scrape the starter