Writing guides, grammar books, punctuation how-tos . . . do you read them? Not read them? How many writing books, grammar books, dictionaries–if any–do you have in your library?
At work, I've got the company style guide, and that's about it. At home, I don't have any of that stuff. I've got a dictionary and thesaurus, but more often than not I'll look up a word in an online dictionary (since I do my writing on my laptop, and not by hand).
In terms of writing books, I've got Robert McKee's Story (which is alternately quite good and throw-across-the-room maddening), a copy of The Artist's Way which I got about halfway through, and Anne Lamott's Bird by Bird, which I loved.
I came to fiction writing quite late, comparatively (after I turned 30), and I tend to be the type of person who wants to try something first rather than read about it (I'm the classic push a lot of buttons and click a lot of windows rather than read the instruction manual) so I like to try to figure it out myself.
I've always had a good instinct for grammar and punctuation, and I want to continue to improve my craft by reading other fiction and actually writing, so I just don't have a lot of these kinds of books (save the Lamott, which was about a lot more than writing).