I assume this is referring to during the winter season, which for most of us will last for a minimum of 2-3 more months before spring sneaks in to warm things up.
To the eternal aggravation of our four children, husband and I prefer the thermostat to be kept below 68 degrees. It's not just to save on gas for our furnace. I've read that it's healthier to sleep in a cooler room. It's also supposed to be helpful in losing weight, since a certain amount of calories must always be used to keep your body core warm. And personally, I usually have a lower resting body temp than most people, so I rarely feel cold. But here are some ways I use to keep warm when it's snowing outside.
1--Every morning, I do at least 1 hour of Jazzercise. There's nothing like doing some cardio routines to warm you up by getting your blood pumping quickly. We also do weight routines--some days more than others, which ramps up your metabolism so you burn even more calories throughout your day.
2--I got new sheepies from my husband for Christmas. That's what my family calls the sheepskin shearling slippers with the furry part inside, to keep your feet as warm as possible--because with cold feet, the rest of you will never feel warm.
3--On weekends, when my husband and I are watching a movie with our pizza, or both reading in the living room, we have a cheery fire going in our fireplace. Actually the fireplace with the built-in-china cabinets was one of the things that sold us both on the house.
4--Afghans! Years ago my mom crocheted afghans for each of us. The kids promptly ruined theirs by dragging them around the house playing with them, but my husband and I still have ours. And I've been crocheting since mom passed away, as a way to stay close to her. To date, I've made 35 adult-sized ones, some with double yarn for younger women like my daughter and my daughter-in-law, who are always cold. I've also made 5 baby-sized ones for babies for their 1st birthdays, when they can have blankets in their cribs--or in my younger grandson's case, with him where-ever he goes--like Linus in the Peanuts cartoon. I tell the recipients that when they feel sad or cold, they should wrap themselves in my afghan, and that's me giving them a warm, loving hug.
5--And of course, as a romance writer, and reader/reviewer, I always have romance stories in my head, to keep me warm. The steamier, the better! My husband lives for those moments when I call out, "Honey, can you come here for a bit? I need to know if this scene I'm writing is physically possible." LOL!
What are ways other authors keep warm? Hop along to find out.