Finished my taxes and I overpaid = I'm getting a fat refund

Finished my taxes today. I'm going to be getting a good chunk of money back from the government. Actually if I would have figured out my with-holding the right way at the beginning of the year I could have avoided having the government hold on to my money and I could used it for something. What do you do when you get a tax refund? I want to put in savings, but my wife has other plans (a new