I didn't do well on it my first time because I never practice for it and couldn't think of any examples, but I'm getting more confident now that I have a few solid ones..
Theres some lists of examples on here in other threads, but I really like having general philosophy ones to mix in every prompt.. ex- immanuel kant (morality), john rawls (veil of ignorance) , jeremy bentham (utilitarianism)
they give a good background to determine (synthesis) when your examples apply. theres a really good lecture series from harvard on iTunes U called Justice. if you have time id check that out, or just get summaries from the justice web site.
i pull all my specific examples from things i can write a lot about like favorite tv shows (Game of Thrones, Lost) or books.