Honest Mistakes in Business with Nora Sheils. RockPaperCoin.com. To err is human — mistakes happen. For many entrepreneurs, the smallest slip-up can feel like a colossal failure. Yet, the reality is that everybody learns hard lessons from time to time — even those that seemingly have it all together. Nora shares her own business mistakes, how she learned from them, and why she believes failure isn't a bad thing.