Spolsky, half paraphrased:

• "Don't answer questions that have already been answered elsewhere."
• Only close real duplicates
• Edit questions to make more general
• "Help us build a great library of canonical answers."

A few of my curated answers (and some comments!):

• try, except, else - "I searched through many, many pages, but your explanation was simple and resolved my confusion."
• Performance Breakeven Analysis - "This is really nice, thanks!" & "You should write a book!"
• yield keyword in Python - an answer with an appendix and footnotes! :)
• __str__ vs __repr__
• Static methods - "answer is so far down [...] is the only reason I can think of for so few votes"
• Append vs. Extend - "best explanation[s] I have ever seen ... job well done"
• Dictionary Autovivification - "Scrolling down really pays off"
• @staticmethod vs. @classmethod
• Check if a directory exists and create it
• How to ignore Exceptions
• The index in for loops - "beautiful explanation :)"
• __slots__

• Floating Point Division - "+1 for this clarifying answer! ... showed why not convert to float and ... new division in Python 2!"

• Monkey Patching - "This is the most complete answer to this question." & "Thank you for ... illustrating use in unit testing..."

I'm ranked in the top .9% of all time!

My Last Talk at PyGotham! - The Python Datamodel: When and how to write objects