So where were you on July 15, 2007?

If you need to but can't recall where you were on a certain date in your recent past, try this: check your credit card bills. If you've got them on file or if your credit card company keeps them archived online, chances are you can trace your whereabouts depending on how conspicuous your consumption has been.

If, despite your manic plastic use to rack up points for that plasma tv your bills still draw a blank on the date, it's time to consider the only other possible explanation, alien abduction.