MAGNETIC VENT COVERS. Place over vents in unused rooms to send heat where its needed. More effective than closing vents! Reusable magnetic vinyl covers wont scratch and can be easily trimmed to fit. Genius!
If you ever get stuck in a blackout without candles or a flashlight ... A regular sized crayon will easily burn for more than 15 minutes. The paraffin used in crayons is very flammable, but slow burning. Handy to know!