Don't assume that the copy-reader, the proofreader, or the editor will punctuate for you, or eliminate all superfluous punctuation.
Remember that uniformity is more to be desired than a strict following of style.
Don't turn in copy without re-reading carefully and verifying all names and addresses.
Use short paragraphs; always paragraph the lead separately; indent paragraphs distinctly.
Don't write over figures or words; scratch out and rewrite.
Number your pages; when pages are inserted use letters: pages 2, 3a, 3b, 4, 5.
A circle around an abbreviation or a figure indicates that the word or number is to be spelled out. A circle around a spelled-out word or number indicates that it is to be abbreviated or run in figures.
Mark the end of your story, thus: # # #
13. Don'ts:
Don't use "Honorable" or abbreviations thereof, except in extracts from speeches or documents, in editorials, or before foreign names.