  Things that really annoy me: Friends, who at the last minute, want to add an uncertain number of people to a dinner reservation. And who are so freaking lazy that they don't actually call the restaurant themselves (keep in mind that they have ready access to a phone, and seem to be able to answer emails right away, which hints that they're not *that busy at work) that they wait for you to do it. Even though plans have been set for the two of you for the past month, and it's*their (okay, her) friends who are joining in, and you had to make the dinner reservations in the first place even though you currently live across the country and they (she) live(s) 2 miles away from the restaurant.
And you are driving them (her) to the airport the next day (and also did so during that big freaking Thanksgiving rush which took 4 hours, round trip, out of your (my) way) - they (she) could be a little more gracious and helpful with things as simple as dinner reservations, n'est-ce pas? 
