Those heated socks help the whole body, for me anyway, they are a great help. And a woolen beanie hat is a must - it keeps the ears covered. I have usb heated fingerless gloves for when I'm using the pc.
Keeping out of air conditioning and draughts is a must, and I have to rush through the chilled cabinets area of the supermarket.
I use insulated cups and glasses so my hands don't get colder or hotter than the rest of my body. I use insulated oven gloves to handle frozen food.
Rubber gloves for working with hot or cold water is essential.
Even so, I can be in a lot of pain at times.
However, it doesn't stop me walking, carrying, or looking after myself. I plan ahead and keep home cooked food in the freezer (shepherds pies, bologneses, pies, curries etc) for when I can't manipulate a vegetable peeler. I do the housework when I can and ignore it when I can't.
It was difficult when I was working, at times, but not impossible. I had no more time off with Reynaud's than somebody who suffered migraines or monthly stomach cramps.
Attitude is very important.