Best tips for weather proofing your home?

We just bought a house in the summer and live in Maine, where winters are brutal. I used the shrink film insulation kit and thick curtains, door drafts ect. Our house only has one heating method: kerosene monitor which kerosene is more $$ compared to oil but burns more efficient. We also have a portable heater that sometimes seems unsafe. What else can I be doing to keep our house warm? Also, is there a quick method to check if your house is well insulated? Please only answer if you've had experience with cold weather...Best tips for weather proofing your home?
I myself inspect everything. I walk around my home and look for holes especially around my outlets, faucet, gas meter, where my cable cord comes into the home and where the electrical comes into the home. I also inspect my windows to see if they need to be caulked and or plastic put on.(Inside and out) I also inspect where the house joins the foundation for air leaks you will be surprised as to how much air comes in from that area alone. Inspect inside and out in that area. I also inspect around my dryer vent basement windows and the water pipes(inside the house) that lead to the street. I also inspect around the plumbing pipes under the kitchen sink and bathroom sink for air leaks. I also purchase light switch and plug in insulators. Easy job and you will be surprised as to much air comes in from the switches and plug in areas. Check your attic to see if insulation is up there. If that area is well insulated I am sure the rest of your home is well insulated.Hope this helps.Best tips for weather proofing your home?
My best tip to make your house feel warmer is to keep it well humidified. Moist air feels much warmer than dry air.