Start by recording everything you spend for one month. Create a set of categories: Food, Rent or Mortgage, Utilities, Health Care, Entertainment, Clothing, Auto or Transportation, Savings, etc.
Once you have that, then you can look at where you are spending and consider cuts. If you are not saving, set aside something for that first!
One way to pay off debt is to put a moratorium on a lot of your unnecessary spending for some period. For example, you can say: “For three months, I am not going to buy any new clothes, shoes, purses, DVDs or CDs.”