When the weather falls between winter parka and fall coat, the best way to combat the cold is to layer up. This is especially necessary in a city that can start out sub-Arctic, gather the strength to warm up, toss in a mid-afternoon blizzard and turn balmy by dinnertime. It’s truly an art that we locals have mastered. There’s nothing worse than starting your day in a thick wool sweater and spending half of it feeling as though you made a wrong turn at the water cooler and ended up in the sauna. So if you’re wavering in the morning, sometimes the right decision is the one with many layers.