As investors, we are not immune to mistakes. Everyone, including the world’s best investors, may be prone to error. And it is not for the lack of knowledge or capability. Rather, studying a business is a complex undertaking, with multiple internal and external factors to consider. A company may have a strong competitive position in the industry, but should its customers go bankrupt, it will still suffer. Likewise, a well-designed product can still fail if it does not have enough distribution channels to deliver it to its customers. More than ever, it’s basic things such as these that can trip us up when we least expect it. Thankfully, the solution can be simple: making a checklist. Your personal list A checklist is simple but flexible. In my view, a DO-CONFIRM checklist provides the best complement for investors. According to Atul Gawande, the author of the Checklist Manifesto, a DO-CONFIRM checklist is a...