Most people write below their potential. This old book might help a lot of us write much better. I was advised to get a copy and heed it. Let me pass along the advice. If you write anything that others must read you must read this. Some writing is very hard to read...understand and even embarrassing.

Strunk, William, Jr. 1918. The Elements of Style

Asserting that one must first know the rules to break them, this classic reference book is a must-have for any student and conscientious writer. Intended for use in which the practice of composition is combined with the study of literature, it gives in brief space the principal requirements of plain...