1. Name your characters uniquely. If one is named Sara do not name the other Sandra; if one is Posey do not name the other Moses. People reading you for the first time are rushed and need easily to differentiate your characters.
2. Listen to what the publisher, producer, agent or manager says about what they want to see, and know what kind of work they like.
3. Proofread every single piece of writing you send out. Mistakes, typos and misspellings make you look careless and unprofessional.
4. Make sure your email address relates to your name. Strange combinations of letters and numbers that bear no resemblance to your name lower your chance of getting a response, a selection or any correspondence.