I'm a little envious of founders who think this way. You've taken a problem you faced and turned it into an opportunity, which is awesome. Faced with the same problem I am certain I'd simply have tried to learn to "be more organised", and likely have failed and carried on with the same problem for a long time. Even if I thought it was a problem lots of other people face I doubt I'd have actually executed on an idea of solving it; I don't see my "failures" as viable problems to turn into businesses.

There's a lesson here for me (and probably many others) that you don't always have to look for big problems or complex problems to find viable startup ideas. Sometimes it can be something simple that just bugs you. I wish you the best of luck.