Do something about it starting today! (and do yourself a favor, don't go on a fad diet just eat fresh fruits and veggies and no processed foods) to achieve this look you must use weights. You can start out with body weight at first if you need it.
Love these things about Winter: a warm fire, wool socks, a glass of mulled cider or wine and reading a good book. Add to all that a cat on your lap and a dog asleep in front of the fire and you have the definition of happiness.