I found these great quotes about writing which I think is great advice for roleplayers:
- Every character should want something, even if it is only a glass of water.
- Every sentence must do one of two things-reveal character or advance the action.
- Be a Sadist. No matter how sweet and innocent your leading characters, make awful things happen to them-in order that the reader may see what they are made of.
There’s more tips by Kurt Vonnegut about fiction writing here.