Breaking the Habit

As many of you know, I love to shop. However, I think I love to shop a little too much and I am trying to control my spending. I was doing great in the month of December. I made a promise that I wouldn't purchase anything for myself that was not necessary for the entire month. It wasn't that bad knowing that I would be getting some pretty cool stuff for Christmas, and anything that I wanted, I could just ask Santa to get it for me. I was so proud of myself for meeting my goal at the end of the month. However, January has been a whole different story. See, all those things that I wasn't allowed to buy in December, have free reign in January. Or at least that's how I see it in my mind. I have limited myself a little bit, but not as much as I need to. Any suggestions on how to break my habit for good?