"When still a child, make sure you read a lot of books. Spend more time doing this than anything else. When an adult, read your own work as a stranger would read it, or even better, as an enemy would."
"Don't confuse honors with achievement."
"Protect the time and space in which you write. Keep everybody away from it, even those who are most important to you."
P.S. On Creepy Query Girl's blog, I read her post about a fellow writer's work being stolen from a friend. This is one of the most devastating things that can happen to one of us and unfortunately, occurs too often. Of course, when it occurs with a friend, that bond is likely corrupted for good.
With the internet, it's become easier to steal someone's words and ideas and then just conveniently disappear, like in this case. Still, Wendy is handling her situation with an admirable grace. Go show her some support and remember, be careful with your work but as Wendy noted, don't allow one negative experience to taint future relationships.