It looks like most sites have boilerplate text for the "don't ask this", but given the recent discussion involving the "too localized" flag, I thought we may want to consider adding some text about the scope of the site. I like EpiGrad's description of appropriate questions:
You should not ask "a question that will help only me," but rather "a question that will help people like me." If your question is so limited as to be useful only to you, consider broadening the scope so others can learn from your question as well. As a general rule, if you're asking about a particular institution, course, or journal, it's likely your question is too limited in scope. Try to extract the fundamental question from the specific problem at hand.
EDIT: Incorporated wording from Charles's comment below.