If you saw Greg Owen's three-putt on 17, which caused him to lose Arnold's tournament, you can feel his pain. I was watching the tournament after playing a wet, muddy round at my club. When he missed the first putt and immediately stood over the second putt, I yelled, "Take your time!"
Unfortunately, he didn't.
If you're working on a tight deadline, and things fall apart, say you can't find a document you thought you saved, it's best to take a deep breath and step back. Rather than randomly pushing different keys and getting angry, you need to push away from your keyboard. You might find it by doing a search of your hard drive, or the worst outcome, you'd have to re-compose the document.
The important thing is if you keep your head, you'll have a better chance to get that deadline met and make that comeback putt.