At the top level, you want to think about content and organization (what you are saying and how your are saying it).

• Content
  1. pointed title defines your purpose
  2. clear thesis in the introduction
  3. takes a position, arguing/persuading the reader towards your goal
• Organization
  1. Each paragraph has a coherent central idea;
  2. each links with those before and after through appropriate transitional phrases or sentences
• Sources
  1. Your source should be credited (with an author named or listed in parentheses); direct language in “quotation marks” etc.
  2. but most important is that you integrate this source well, weaving it into the fabric of your argument (conceptually and syntactically).