You might want to read this article on writing the perfect question – originally for Stack Overflow, but relevant here too.
However there is no link to the article on writing the perfect question. I'm pretty sure it is referring to http://msmvps.com/blogs/jon_skeet/archive/2010/08/29/writing-the-perfect-question.aspx (Why? Because that was the link that was used in the earlier draft for this part of the FAQ.)
Can we get the link added to that help page?