It's more of a carpentry phrase but it applies in other things as well. A good example is what I did today. I've not been real happy with any of the hosting company's I've tried. One was blacklisted as a spammer by some mail servers. Another seemed to be a spammer themselves. I finally found one I liked and I've slow been moving things over to that site. Unfortunately, I wasn't paying attention and managed to close out one of the old accounts while it was still a live site. It's not a huge deal, it will not affect mail and hardly anybody goes to either site. Still, it's an annoying and bit embarrassing, thing to do.