50 Book Challenge
I've been doing the annual 50 Book Challenge since around 2008 and it basically means I try to read 50 books a year. Some people really dislike setting challenges, as it should be about enjoying books and not counting the numbers, but personally this really helps me stay motivated, as sometimes I simply get too distracted by Netflix! I'm currently catching up on the full list, so in the meantime take a look at my GoodReads.
100 Films Challenge
I've been keeping track of every film I've watched since 2009 (in theory). See the full list here. It definitely comes in handy when I'm trying to recommend films to friends or just check how many times I've seen my favourites.