Do not justify text. Use ragged right.
Use only one space after period, comma, colon, semicolon.
All numbers over 999 (except dates) use commas, as in 14,472.
All numbers are spelled out up to “ten,” numerals for 11 and higher. The only exception is percentages, as in “2 percent.” (See next item.)
Always spell “percent,” never use % sign.
Commas and periods always go inside quotation marks, as in “Go,” he said.
Never use just the last name of a living person. Men are always Mr., Prof., Doc., etc. Women are Miss or Mrs. if marital status is known, Miss if not known. They are never Ms.
No periods when US is used as a modifier, as in US Army.
Do not use the passive voice unless absolutely necessary.
Ordinals are 12th, 13th, etc. Do not use superscript for the “th.”
Never start a sentence with a numeral.
Always spell out the months of the year; no abbreviations.
Use 1960s, not 1960’s.
Do not use a long word when a short one will do.
Ellipses are period-space-period-space-period-space. Do not use the ellipsis character.
Make every word carry freight; no padding.
Do not use clichés, such as “selling like hotcakes,” “complete disaster,” “meteoric rise,” “this day and age,” “like never before,” etc.
M hyphens (the long ones used to set off phrases) do not have a space either before or after.
Thank you and happy writing 🙂