Paul Kirtley is a professional outdoor skills instructor in the UK. Founder of Frontier Bushcraft, Kirtley teaches wilderness skills and self-reliance to both camping enthusiasts and hardcore survivalists.
In an old Swedish book, Kirtley uncovered a description of unique type of fire called Nuorssjo, and referred to as den bästa stockelden (literally, "the best logfire") by the Swedes. This type of fire differs from others in both its configuration and its long-lived design; it is intended to be used in deep snow when it's time to get some shuteye, and the way it's constructed provides enduring heat. Check out the technique:
Kirtley's tip-loaded blog is here, and he's got a dense and informative YouTube channel here.