Another common misconception: You need to learn from your mistakes. What do you really learn from mistakes? You might learn what not to do again, but how valuable is that? You still don’t know what you should do next. Contrast that with learning from your successes. Success gives you real ammunition. When something succeeds, you know what worked—and you can do it again. And the next time, you’ll probably do it even better.
Note: Learning from your mistakes is overrated. Succeed instead:
likely to make a great call today as you are tomorrow.
Note: Some good advice on product decision-making from @37signals: