Here's a pet peeve that always happens to me without fail: I order a few things off a website and then something compels me to look back
through the website once I've completed my transaction. I ALWAYS see something else I want or should have ordered. I don't want to eat the extra shipping charge on some dink item like a drip tip or bottle of
juice, so I send some awkward apologetic email to the effect of: "Gee, um, sorry, but, uh, could I please add this one little thing to my order, that is if you haven't already processed it and/or shipped it yet? Oh yeah, uh, I'm really sorry for the inconvenience. Apologetically and sincerely yours, Tez." Despite my groveling and self-effacement, I often get a "sorry but no." Uggghhh!