In order to save money, you HAVE TO sit down and write down ALL of your expenses (everything, no exception) and then ALL of your income.
Then separate your expenses into MUST HAVE (housing, food, transportation, etc) and NICE TO HAVE (eat out, movies, etc.). Go over every single item and see if you can cut back such as get a cheaper place or roommate, buy groceries on sale and in bulk, eat out a lot less, and so on). And then see if you can increase your income by getting another job or anything that you can bring extra income.
For example, I am still driving my vehicle because it is still running even I can get another one, I don't stay in a luxury location, I don't eat out everyday.
Saving money is not easy, you just have to bite the bullet and do it. I am saving about 50% of my salary (after taxes) plus my income from my business. It is easier for me because I live in the South (lower cost of living) and I am single and no kid.