Reader, what is the hardest thing you ever had to learn? Did you finish learning it, or are you still learning? Do you think you are an expert at it now? These questions probably bring a particular thing or list of things to your mind. What is that thing you do so well but you never learned officially? For me, it's web design or any form of design at all. I learned everything I know through constant practice. What is your learning curve like? People have probably told you that you are a slow...