Grab Some Envelopes
This strategy may sound old fashioned, but when you’re done you’ll know exactly where your money going. Write down everything you spend money on for one week. At the end of the week, separate your expenses into different categories like Gas, Grocery/Food, Entertainment, Shopping, Rent, etc. Label envelopes and put a specific amount of money toward each. Once the money is gone you’ll be forced to make the appropriate decisions, says Ornella Grosz, author of Moneylicious: A Financial Clue for Generation Y.