The Element of Style

Form the possessive singular of nouns by adding's
In a series of three or more terms with a single conjunction, use a comma after each term except the last.
Enclose parenthetic expressions between commas.
Place a comma before a conjunction introducing a co-ordinate clause.
Do no join independent clauses by a comma.
Do no break sentences in two.
A participial phrase at the beginning of a sentence must refer to the grammatical subject.
Make the paragraph the unit of composition: one paragraph to each topic.
As a rule, begin each paragraph with a topic sentence, end it in conformity with the beginning.
Use the active voice.
Put statement in positive form.
Use definite, specific, concrete language.
Omit needless words.
Avoid a succession of loose sentences.
Express co-ordinate ideas in similar form.
Keep related words together.
In summaries, keep to one tense.
Place the emphatic words of a sentence at the end.

Writing