I think the only time I doubted myself was my senior year in high school. I was not offered a Division I scholarship. I remember a scout from Ohio State coming in and looking at my film. He was all excited to meet me. Then he met me and I was 5'10" and he said that I was not a Division I quarterback
I was trying to figure out what to do next, I'd been accumulating ideas for productivity tools - software people could use every day, particularly to help organize their lives.