LPT: From a licensed Water Distribution Operator, the guy that makes sure you have running water to your meter, a few tips and tricks to keep from having busted pipes, and how to prevent them.

Basically any section of water line you have that is exposed to to the open air, that is below freezing, and has no flow will freeze within minutes. Especially if sub-freezing/zero temp air is blowing around them.-Open up your faucet about a half a turn. Just enough to get a pencil size stream. Yes it will raise your bill a bit but it will be nothing compared to a 3/4" line freezing or bursting.-Invest in foam insulators, think ones that look like pool noodles. Even they will work.-If you have a line freeze try pouring hot water on it to get it thawed. You can get snow and if you have power or if power is out and you still have gas heat it til it's hot, not boiling. Boiling will cause pipes to stretch and that won't be good.-Seal off any way the cold air can get to it. Even just a cardboard can keep a line from freezing.-ALWAYS REMOVE ANY, AND I CANNOT STRESS THIS ENOUGH, ANY WATER HOSES CONNECTED TO OUTSIDE FAUCETS, THE WATER WILL FREEZE IN THE WATER HOSE WHICH WILL BEGIN TO MOVE DOWN THE FAUCET TO YOUR LINES FREEZING AND BURSTING!!Tips to be prepared for next time:If you haven't yet, invest in something called heat tape. It is a band that you wrap around a pipe and it plugs into a standard outlet, then cover with foam pipe insulation.If you're afraid you will lose power/water, fill all tubs/sinks with water. It will be good for a while.