When it is cold enough to have to wear heavy gloves, "BobCo19-65's" method is good.

My hands and feet do not get cold very easy, but when the temps drop I like to use an insulated mitten (I find a mitten to be much warmer than standard gloves) on my bow hand and "BobCo19-65's" method for my release hand. I pin the "muff" at my waist in front at belt-buckle level so that I can easily slide my release hand in and out.