A harder way is to follow a set of rules that require active effort by you.
An easier way is to use special products but it means you need to spend some money.
Rub your hands together rapidly. Sit on your hands.Breathe on your hands. Keep your hands in your pockets.Place your hands under your armpits.Put your hands between your legs.
Exercise your hands. Do finger wiggles, hand stretches and shaking of the hands.Hold a cup of hot coffee, tea or cocoa.Put them in warm water.Ask someone to rub your hands until they're warm.People with cold hands tend to breathe shallow. Practice deep breathing.
The following foods improve circulation, thus helping cold hands: cinnamon, ginger, fennel, cayenne, potassium, niacin, iron, vitamins B, C and E, lecithin, Ginkgo Biloba, apple cider vinegar.
Stay hydrated to increase the volume of blood flowing to your hands.Don't smoke. Nicotine constricts blood vessels.Try a mind-body technique, such as imagining something warm.Get a blood test done to check for iron deficiency.Try acupuncture.Reduce stress and anxiety.Avoid static lifestyle.
These products will keep your hands warm even in extremely cold temperatures.