All the information you need can be given in dialogue.
My most important rule is one that sums up the 10: If it sounds like writing, I rewrite it.
I get letters. I get several a week, I think. A lot of people want a picture, a lot of people just want an autograph.
Using adverbs is a mortal sin.
Try not to write the parts that people skip.
I want the reader to know what's going on. So there's never a mystery in my books.