Over on Facebook, Samuel R. Delany, answering a question in a post, offered the best and most succinct writing advice anyone has ever codified. Here, in its entirety, it is: (Read the rest at Flogging Babel)
http://www.sfwa.org/other-resources/for-authors/writer-beware/agents/?fbclid=IwAR2q0Snl2-Y-qKplTMfDnjrS-E6sEdCIRuGfYqrTrDH20sfxSKwi9RIwTeg The article linked above was mentioned elsewhere by a friend. It’s well worth reading.