Use blinds, shades & window treatments effectively
You may not realize it, but you can significantly warm a room (or cool it down) by what you choose to do with your window treatments. During the daytime, if you have bright sunlight coming directly through your window, this will heat up a room significantly. If you want to heat up the room (say it is winter), roll those blinds up and let in the light! Likewise if it is summer and you are trying to cool this same room down, roll a thick, sunlight blocking shade over the window. If you are trying to keep a room warm at night (like a bedroom), put the shades or curtains down, so that heat doesn’t leak out the windows.
Turn down your heat and hang out in the kitchen when you cook and bake
There’s nothing that can take the winter blues away like some hot soup or delectable baked goodies and if you’re going to be turning on your oven any way (presumably you use that stove relatively frequently?), why not turn off your heat and hang out in the kitchen for a bit? Back in the olden days, people used to huddle near their hearths for warmth, and there’s no reason why we can’t follow their lead. It’s true that our ovens need electricity (or gas) to operate too, but if you’re going to be whipping up some cookies, cakes, soups or casseroles anyway, might as well repurpose all of that hot air to keep yourself warm too. Besides the money you save by not double heating your home, the sweet and savory smells wafting through the air are another nice incentive!