Here, a few gems, in no particular order, from a faculty presentation.
•When writing dialogue, leave out anything the reader can intuit from previous dialogue. Stop before the reader is really ready to leave the scene.
•Alternate sentence structure.
•Please leave out all the boring details and descriptions of everyday activities, such as "she got into bed," "he got in the car."
•Don't try so hard to explain things. When the writing is good, the reader will be engaged.
•Incongruity is more interesting than symmetry.
– Kelly Link, author of the short story collections, Magic for Beginners and Stranger Things Happen, and winner of Nebula, Hugo, and Small Fantasy Awards