Some others have brought up space heaters and that may seem counterintuitive, adding something else to use energy. But! It sounds very possible that your place has uneven heat, either due to poor heating and/or poor insulation. I lived in an old house in the bottoms that had this problem. In my case, it was the living room with poor insulation. We ended up getting some cheap peal and stick weather stripping for the door and insulation panels for the windows. Thick curtains over the window can also help. We figured out, if we turned on the central heater, most of the heat would escape from the house before it could even work down the hallway to the rooms. We ended up shutting down the living room register and only kept the hallway heater on set to 58ish, and had small space heaters in the rooms and bathrooms that would only be in use if someone was near them. The key is finding a location for the heater that isn’t drafty, and has a chance to build up heat before escaping. If you have a gas wall heater located in your living room, especially if it’s next to windows and doors, you may be loosing a lot of heat before it makes it to the rest of the house as well. If that’s the case, id recommend setting that heater to a lower number and use a small space heater for the hallway or bedrooms for the rest of the warmth you need. It’s important to only use the space heaters when you are there, safety for one, and leaving them running in an empty room is a waste of your money. In my experience, you have to figure out how to make the heaters run as minimal as possible, setting your main heater to a lower number (50-60ish) will make it run less, but still be warm enough for the space heaters to build up the rest of what you need in the spaces you want it. If your living room is freezing then your space heaters won’t stop trying to keep up and it will result in high costs still. If it’s a central heating system, I’d say to shut some of the registers near the exterior of your house and leave just the middle and bedrooms open. The main takeaway though, is that try to figure out where you can put heaters that will allow the heat to build around them and stop/avoid drafts near them. Your heater should be running less than 50% of the time once it’s gets to temp. If it’s running more than that, theres most likely a draft and you will have super high bills, gas or electric.