Don't commit to being a columnist unless you're willing to do it right. Report your behind off, so you have something original and useful to say. Say it in a way that will interest someone other than you, your family and your sources. Allan Sloan
Don't flatter yourself that friendship authorizes you to say disagreeable things to your intimates. The nearer you come into relation with a person, the more necessary do tact and courtesy become. Oliver Wendell Holmes
Don't Take Anything Personally. Nothing others do is because of you. What others say and do is a projection of their own reality, their own dream. When you are immune to the opinions and actions of others, you won't be the victim of needless suffering. Miguel Angel Ruiz
Don't use words too big for the subject. Don't say "infinitely" when you mean "very"; otherwise you'll have no word left when you want to talk about something really infinite. C. S. Lewis
Don't worry about what others say about your music. Pursue whatever you are hearing... but if everybody really hates your music maybe you could try some different approaches. Wynton Marsalis
Each instrument has something to say to you. It's got its own character. Each horn has its own character and will say to you certain things. If you violate that, it's almost a sacrilege! Jerome Richardson
Early in my career I was accused of being overconfident and even cocky, but I really was confident that I had done the training and didn't see any other reason to say otherwise. Alberto Salazar