Write English composition should be notice.

1. Organize your thoughts before writing: brainstorm、make an outline、ect.
2. Write clearly. Be concise. Avoid wordiness.
3. Use good grammar and write complete sentences.
4. Write simple sentences. Avoid a fancy style.
5. Avoid slang、cliche and informal words.
6. Avoid use of the first person(i.e. I/me/my) unless necessary to specific piece.
7. Writing naturally. Reading it aloud. Does it sound natural? Does it flow?
8. Move logically from one idea to the next. Don't skip steps.