Insulate Your Pipes
Installing pipe insulation is one of the most effective ways to protect your plumbing. According to the US Department of Energy, insulation can keep the water in your pipes 2-4°F warmer than it would be in uninsulated pipes, which can help prevent your pipes from freezing and bursting.
Polyethylene foam sleeves that wrap around your pipes and pipe wrap insulation tape that prevents condensation from forming on the surfaces of your pipes are two of the most common types of pipe insulation. Both of these should be available at your neighborhood hardware store.
When insulating your pipes, pay special attention to areas that are prone to becoming cold, such as attics, basements, and crawl spaces. Similarly, any pipes that run along exterior walls should be insulated.