[ubermonkey]

This is one reason I enjoy the fact that I really only use one card. It's dead simple to review one bill every month.

99% of all my economic activity (excluding my mortgage) goes through my Amex. I have a MasterCard, as a backup, but I almost never use it for anything meaningful (it actually lives in my cycling wallet, so I have a card there Just In Case).

My actual bank account sees very, very, very few transactions by comparison: I get paid there, I transfer out to savings, I pay the mortgage, I pay any tiny charges on the MasterCard, and I pay the Amex bill, and that's about it.

This makes it VERY easy to keep track of recurring charges.