Very good question, as a college student this was something I also had to work on this and the key thing to do is being able to say do I need it or want it. When you go to the store or online to buy ask yourself do I need this realistically or do I just want it (example-you want an Xbox vs. I need food). Another thing is making sure to be consistant in saving money in any way possible.
Jonathan recommends the following next steps: