-Caught a false charge. A $500 charge at guitar center popped up pending on our card, which I saw thanks to Mint. We kept our eye on it, and the second it went confirmed, called AmEx. Right at the same time another charge, $400 this time, popped up on the card. Annoying as all (*&#&&&&!! to have to replace a card again, but glad I caught it early. This is the FOURTH time in two years we've had crap like this happen. So frustrating. Apparently AmEx automatically updates all your recurring purchases though? So we won't have to switch utilities, etc, which is nice. So, $800 caught.
-Second one I caught: we gave people some magazine subscriptions for Christmas. I went in last month to cancel, and we had nothing under subscriptions. Okay, cool! I must have set it up somehow so it doesn't autorenew. WRONG. Did you know there are THREE different places on amazon where subscriptions of various sorts are listed? Super goddamn frustrating. Anyway, found where they were listed after much googling, and contacted customer service. Annoyingly, they didn't seem to give a shit that it's the worst user interface possible for that, but at least they're giving us the refund. $40 caught.
Point being kids: even if you think you have your expenses under control, track your spending. It's not always yours, haha.