Analogies are an important technique for defining complex terms. Here are some Websites that discuss how to use analogies effectively.

• Writing Analogies
  The English Teacher
  
  
• TIP Sheet: How to Write an Analogy
  Butte College
  
  
• Analogy vs. Metaphor
  Chris Lofting's 'old' website

Metaphors and Similes

• Metaphor, Analogy and Simile
  University of Texas
  
  
• Metaphor
  Wikipedia
  
  
• Metaphors We Compute By
  University of Michigan
  
  
• Metaphor
  Silvae Rhetoricae at Brigham Young University
  
  
• Simile
  Silvae Rhetoricae at Brigham Young University
  
  
• Comparison
  Silvae Rhetoricae at Brigham Young University
  
  
• Exploring Language: Making Comparisons
  English Online
  
  
• Using Metaphors in Creative Writing
  Purdue University Online Writing Lab (OWL)