ita ego ut deus, deus ut ego. ego tam magnus quam deus, ille tam parvus quam ego. neque ille potest supra esse, neque ego subter.

http://www.wikihow.com/Write-a-Letter-of-Recommendation

http://web.clark.edu/jpitkin/What%20Makes%20a%20Good%20Essay%20%28English%20098%29.htm

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"1.       Focus: A well-focused essay speaks about one main topic, called the thesis, and does not stray from it. In the case of short essays, this main topic can often be identified in a single statement in the essay, called the thesis statement.  Even when there is no single explicit thesis statement, however, the essay should be focused around a single idea. The main topic of the essay is not so broad that you cannot explore it fully in your paper; also, it is not so narrow that you cannot develop it (for more on development, see below). Though you may write an essay of many paragraphs with many different arguments and pieces of evidence, everything in the essay should ultimately support your main idea.

2.       Development: An essay is well developed when every claim you make is supported by evidence of some kind. Depending on the kind of essay you are writing, this evidence might be examples from personal experience, details, facts, statistics, reasons, or other arguments. A well-developed essay does not claim anything to be true without offering evidence to show why or how it is true.

3.       Audience Awareness: Good writers tailor their essays towards the needs of the audience, or reader. Put more simply, a good writer chooses a tone that does not insult or talk down to the reader; similarly, good essays are written at a level that the audience is likely to be able to comprehend. In all communication, what we mean to say and what we actually do say can be very different things; good writers, however, work hard to minimize this difference. A writer with good audience awareness also does not make unfair assumptions about the reader’s gender, race, religion, class, sexuality, or value system.

4.       Organization:

5.       Correctness:

6.       Research and Citations: When it’s called for, students should know how to find outside information to support their arguments. They should also know how to cite this outside information correctly, giving credit wherever another writer’s words or ideas are used."