You might remember last month when I wrote about my human error in putting an upside down coffee mug under my Keurig brewer. Oops. Mike Thelen, a good friend of mine and this blog, sent me a little gift that’s intended to prevent future mixups: This really cracked me up… as you can see, green arrow up = good. Red arrow up = bad. As was pointed out by a Twitter follower, when I shared … Continue reading Follow Up: Error Proofing my Keurig?