In this video, Motley Fool financial analyst Matt Koppenheffer references a quote from famed stock investor Peter Lynch about how often we get our investment picks correct. He discusses how so many of us focus on how to be right all the time, when, in fact, there is so much to learn from the times when we're wrong. He highlights two of his own investments that didn't go quite right, in US Bancorp (USB 0.44%) and Bank of America (BAC -0.19%), and tells us what the big takeaways for him were that made him a better investor today.