Try to move more actively. Going to nearby shops - to warm up.
And think that a hot mug of coffee / tea is waiting for you at home or at work.
I carry tea in a thermos with me. And sweets to him. If you have a snack, it's not so cold anymore. I'm not a glutton, don't think, it just really helps me :)
It is important to note that body heat in the cold is consumed not only through the skin, but also during breathing, since you breathe in cold air and exhale warm air. Thus, breathing protection plays an important role. Some people in the cold cover their nose and mouth with a scarf, comforter or balaclava, or even just with their hands in gloves or mittens. It is categorically not recommended to do this - the fabric will freeze and you will breathe cold moist air. In addition, the resulting condensation is an excellent breeding ground for pathogens.
A new invention of mankind, the so-called heat mask, helps to fight cold and heat loss during breathing. It is similar to an ordinary balaclava, but differs from it in the presence of a special thermal block, which, roughly speaking, collects the thermal energy of the exhaled air and transfers it to the energy of the inhaled air, so that even in the most severe frosts, you can breathe air at almost room temperature. Such a mask costs about 2500-3000 rubles.
The most common respirator can serve as a more budgetary option for such a mask. It retains some of the heat of the exhaled air, which compensates for the coldness of the inhaled air. In addition, the respirator has a separate exhalation valve, due to which the material of the respirator works only for inhalation and is much less saturated with moisture from the air. There are different models of respirators, ranging from simple fabric and ending with rubber with replaceable filters, from several tens to several hundred rubles, respectively. The disadvantage of this method of protection will only be that your somewhat strange appearance, but this is generally typical for winter clothes - remember how heavy fur coats and sheepskin coats are and how down jackets make you look fat) Also, when using rubber respirators, it is undesirable to allow cold rubber to come into contact with your face. This problem is solved by choosing a respirator model with a tissue layer in the appropriate place or by wearing a comforter or balaclava under the respirator.
hugging passers-by, probably it will help, not yet go out on the street receiving unemployment benefits, in winter this is the most top option, I would still move somewhere where it is warm
For winter, thermal underwear with a maximum content of merino wool is usually recommended. But it is not cheap and is really more effective if you spend a lot of hours outside without the opportunity to refresh your clothes. In ordinary urban conditions, not all day on your feet, you can get by with a dense cotton / wool.
A couple of tips from my experience:
Maximum windproof top layer. If activity is not provided for, a good down jacket is, in my opinion, the best choice.
2 thin sweaters are better than 1 thick one, with the same volume / weight occupied. You can wear as many sweaters as the top layer allows, so that it is not crowded, without "squeezing"
Select exactly in size - otherwise it will either blow or squeeze, and both speeds up the freezing.
of course, just jeans may not be enough. It is worth putting on something warming underneath, and the warmed tight jeans themselves help.
Take good care of the neck. Well, the feet are usually the most painful place. In my opinion, the warmest winter shoes in the store are for active tourists / climbers / "hikers". But it also costs decent, although with a guarantee, often for a couple of years - personally, in such stores, the manufacturers changed my shoes 2 times - once they started getting slightly wet and the other - the thread sewing on the patch on the sock was slightly fluffed. Changed after more than a year of use, for new ones (or refunded). Well, to choose warm shoes on a warm sock, so as not to sting.
I myself do not get over the cold very badly; frost is not a hindrance with good, thought-out clothes.