I have been meaning to mentioned this website for some time but for the past year or so I have been visiting the Southport and Formby Quiz League website on a weekly basis. Primarily due to the fact that they are one of the few leagues out there who upload there question sets to the site. There are always a wide range of chestnuts in each set (ideal if you havent heard them before) and I always enjoy wading through the weekly sets. The site also contains an archive of older league sets making it a good resource to work through.
The site can be found HERE