This piece was brilliantly written by my fellow curator, Robin Good. In Robin's own words - A great curator does the following:
"Optimizes, Edits, Formats, Selects, Excerpts, Writes, Classifies, Links, Personalizes, Vets, Credits, Filters, Taps, Suggests, Searches, Scouts, Hacks Filters and Searches, Is Transparent, Recommends, Crowdsources"
As you read this article, pay attention to how he has done all the above. He creates a standard, he gives you some criteria so you can understand what makes someone great and what makes someone no so great.
Via janlgordon, Marcia Conner