I do recall G-d giving me a Brian Westbrook punt return for a touchdown, and from that point on I didn't look at those "prayer changes things" bumper stickers with the same side eye.

But speaking seriously, no, I have never prayed at work. For me prayer is something very rare that I save for the most serious occasions. I've only prayed for severe situations with loved ones. Everyone does their own thing though, that's as personal as it gets.