Grammar, punctuation and mechanics tips:

1) Capitalize proper nouns.

2) Make pronouns and their antecedents agree.

3) Indicate possession with an apostrophe; indicate plurality simply by adding an s onto the end of the word.

4) Use who, not which or that, to refer to people.

5) Fix fragment sentences.

6) Revise run-on sentences (including comma-splices).

Clarity and style tips:

1) Use active verbs.

2) Write crisply, avoiding wordy sentences.

3) Write an outline and stick to it.

4) Use paragraphs as your unit of composition.