How do I write a characterization paragraph?

What's an effective way of characterizing?

There is enough here to give you many ideas..

http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla:en-US:official&hs=Elo&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=characterization+paragraph&spell=1