Unfortunately Papa is long gone, but you can still get writing advice from him: How to Write Better Prose According to Ernest Hemingway.
One that I always have trouble with is writing short sentences. I do love my run-on sentences. I also like how Wainwright expounds on Hemingway's concept of "Write drunk, edit sober" from a non-alcoholic point of view. But it's all good advice.
Pic snicked from Hemingway's Wikipedia entry.