Don't make common mistakes:

One drawback of pushing a filing deadline, either in April or months later, is that folks tend to wait until the very, very last minute. And that often contributes to file-in-haste mistakes.
To avoid that, get to work now on your return. Yeah, it sucks spending a weekend doing taxes, but you don't want to be up all Sunday night, or worse, using up a vacation day Monday to get the job done.
When you do finish your 1040, give it a good review to make sure you haven't made any of these 12 common tax filing errors.