4. Have fun with a spot infrared thermometer
You may never have heard of a spot infrared thermometer, but it can help you save money — while being fun to use, too. You hold it like a hairdryer and point it at spots all over your home, and it will tell you what their temperature is. So if you aim it at windows, doors, and walls, you’ll be able to spot big differences in temperature, revealing where hot or cold air is seeping in or out of your house and adding to your energy bills. Spending $15 to $30 on one of these devices can save you hundreds of dollars or more, if it leads you to better insulate your home — whether with a little caulk or a major investment in a professional insulation company’s services.