One word I am surprised the author did not use in this article is patience. Successful people are used to being in a hurry. It takes practice to have patience with yourself, and patience with others.
Another problem that I struggle with, and I'm sure "successful" people do as well, is chronic pain. Sometimes it's just bad luck, or an old injury; or maybe you have sacrificed your health to get more work done (in the short term). Many long-term problems are invisible; you never know who is struggling on the inside.
As a person with a 10+ year chronic injury, thanks for saying this. It was nice even just to read it on the internet from a total stranger and know that somebody is aware that people are dealing with things like this.
Another problem that I struggle with, and I'm sure "successful" people do as well, is chronic pain. Sometimes it's just bad luck, or an old injury; or maybe you have sacrificed your health to get more work done (in the short term). Many long-term problems are invisible; you never know who is struggling on the inside.