Sometimes, while coding, I get distracted by a tiny voice telling me: "Stop that! You're at work!"
But then I think: "Well, coding IS work."
To which the tiny voice replies: "Yes, but it's not YOUR work."

Damn you, tiny voice, I hate when you are right.
My current career(completely unrelated to programming or even CS) is probably my greatest distraction... and I hate that. =P