I actually get a refund every year, and since my wife doesn't work I usually write a check to our IRA for $5,500. If you are in my position, make sure that you take advantage of this. Our return goes up around $1,750 by doing this. ($5,500 into retirement and it ends up costing us $3,750)
We are good at saving our money, so I shouldn't get a refund. I'm actually disappointed in myself for not pushing us to open a money market, high-interest savings acct, or a CD with the extra money in our checking acct. It earns us around $.18/month when it could be earning upwards of $20/mo.
In short, I have been okay giving the gov't an interest free loan, since it's obvious our gov't needs the money and I'm a moron and doesn't take advantage of my extra money... until now.