United States citizens:
You know, you really probably do have time today to do your taxes. Or at the very least pull together all the papers you'll need and find the form. (a hint and have you considered filing online?) There are three possible outcomes: you get your refund early or you figure out you don't have to pay a significant amount or you have extra time to budget for a large amount owed. It's all better than waiting until April.
Rest of the world:
I bet you have some bureaucratic task you've been putting off. Really, it won't take THAT long. Just do it. Or at least get together everything you'll need to have in front of you in order to do it.