Read your meter. Avoiding 'estimated' bills can save on unexpected high gas/water bills! Why get charged for something you don't use?
My husband and I recently bought a new house and a few weeks after we moved in, we received our gas bill, and it was around $35 and I was like ok, that works, we can afford that. A few months later (Dec), we recieved an estimated bill, and it was $180!! We've read our own meter ever since!