I have been meaning to mention this site for a while. Ready Made Pub Quiz has a wide range of quizzes that have ben uploaded over the last number of years. Of course you can search for tags and such like on topics you want to look into, but each time they upload a quiz (which I think is now up to number 130+) it has the full whack...picture round, general knowledge round and themed round. Great for getting practice on the chestnuts and for (in my case) much needed practice on picture rounds.
Click HERE to view the site