For every question and answer, share->cite results in a suggested BibTeX citation. Now that people are actually starting to cite the site, I think we need to revise the template so it is more useful. This would also help nudge the diversity of possible ways to cite the site into fewer likely channels.
First, the existing text "Theoretical Computer Science" is not useful, since the maximum likelihood match for that phrase is the long-established Elsevier journal of that name. "Theoretical Computer Science Stack Exchange" seems a better phrase.
Second, it seems important to indicate whether the citation is to the question itself, or to a specific answer, in the text itself and not just the URL. The title that the citation template generates is the title of the question, and I suggest something like "Response to: " as a prefix for answers, or a suffix of the form " (response)".
Finally, I would like to be able to cite specific comments, and # link to the comment. However, SE seems to deliberately downplay comments, unlike MO, so I am not holding my breath.