And every phrase
And sentence that is right (where every word is at home,
Taking its place to support the others
The word neither diffident nor ostentatious,
An easy commerce of the old and the new,
The common word exact without vulgarity,
The formal word precise but not pedantic,
The complete consort dancing together)
Every phrase and every sentence is an end and a beginning,
Every poem an epitaph.
~T. S. Eliot
Some problematic and easily misused words that can damage your writing and confuse your readers:
and/or and other slashed word pairs (diagonal slash) such as “he/she”, “body/mind”, etc.
British- and American-English Confusions
Write and spell consistently in one or the other; don't use both in the same piece.
Being accustomed to reading British writing, some well-read or academic American writers sometimes use British rather than American spellings and punctuation—a mistake that many readers do notice.
See Style Guides and Dictionaries for information regarding British and American language differences.