I think the better question is what good, productive and beneficial use could I have done with the nearly $20k the IRS extorted from me with the threat of violence this year. Could have paid off some crippling debt and then had the flexibility to have been able to buy a lot of good and services which would help kick start the economy.
Your goal is not to have a big refund, that's just giving the government an interest free loan. File every year, don't mess with them they can ruin your life worse than any non government sanctioned criminal. Would be nice to pay them nothing and just pay at the end of the year so at least you can make that money work for you while you have it, but if you try that as someone else mentioned they'll force you to pay more for not paying them enough throughout the year. Goal should be net zero in either direction with the IRS at the end of the year, or owing them an amount small enough to avoid the extra taxes for not paying enough.
Anyhow, with the small refund I'll get this year I may do group 31s and new cables since I finally got around to putting in solid battery trays. Had two no starts this year around 0* to low single digits. I believe from loose and dirty cable connections, battery was moving around a bit in the rotted out tray and I think it was only trying to start on one. No good when it's that cold! Maybe figure out some filtration system as I'd like to do a light WMO blend when it warms up, would save me on fuel costs and of course fuel tax. ZF5 swap in the works too when I find a transmission, so throw it in the truck slush fund and it'll go toward one of those.