Talking to myself
Why is it that you can walk into another developers office to ask a question - one that you've spent 15 minutes on google trying to find an answer - and you'll know the answer before you've even uttered 5 words.
My old partner Luke and I used to joke that we couldn't figure out anything unless we regularly walked into each others offices and picked up a whiteboard marker. We didn't have to write anything most of the time.
Well, it still happens when working remotely. I've been constantly on IM with Scott Sargent about some code this week and I've begun to notice that half the time I know the answer before I even hit "send".
Which is good, of course, because unlike the guy I've interrupted by walking into his office, Scott has no idea how many dumb questions I was going to ask.
Of course, the other half of the time, I do hit Send and then I do look like a dumbass. 