shortly after I first started reloading I made the mistake of having several jugs in close proximity to where I was reloading. I emptied a half full hopper of Green Dot into an almost new 4lb jug of Titegroup. As soon as I emptied the hopper I realized what I had done and shortly after my wife got fertilizer on her new flowers. That was painful and really expensive to me at the time since I was a poor college student but a lesson I never forgot. Now, all my powders are organized and labeled AND on the other side of the room from the bench. When I get ready to reload I check the bench twice to ensure no powder is sitting out before I grab one for the session. Often times I feel like I triple check everything because of that incident and a practice I share with people when we chat about reloading in general.
Pictures are worth a thousand words so thanks to everyone for the pics and stories, I am going to share this thread with my neighbor as he is wanting to learn the trade now.