Control + Z!

You know the command, right? The + command?  Yes, that is the keyboard shortcut for

I needs me some control Z.  When I told a customer a wrong price today?  Control Z would have been easier than calling her back.  When I spit Diet Coke on my steering wheel because of something I heard on the radio?  Control Z, please.

There is no rewind button.  Roll with what happens.  Fix your mistakes, and move on.  No need to dwell on the BS.  Get on with your bad self.  Make the most of it and move on.