1.) Mortgage or Rent and Property Taxes. Having a roof over you and your family's head should be your number one priority.
2.) Utilities. No I'm not talking TV, Netflix etc... I'm talking Water & Heat Maybe even Internet if that's how you make your living. Search for the energy saver guide at energy.gov for ways to save.
3.) Car Payment. You need a way to get to work. So don't miss this one, you could lose your car, and have to pay a lot of money to get it back.