Wikihow gives good tips on how to buy nothing.

Check out Wikihow's list of great tips here.

Tip #21 is the best..."Ask Yourself the 3 Questions - WANT, NEED and AFFORD Can I afford it? Do I Need it? and Do I Want it? If your answer is YES to all the 3 questions then you can buy it."

I think we will be asking ourselves these questions a lot this year.