It's only appropriate I post the site which I have been visiting most this week.
Reddit.com, 'the front page of the internet'. Users submit content to what is essentially a bulletin board. This can then be upvoted or downvoted. Due to the high amount of submissions each day, there is usually an entirely new front page each day.
There are also a number of subreddits, categories such as film, music, humour, games and news. One of the most popular Reddits is the 'IamA', where various celebrities answer questions users ask. Basically an interview, except the questions are asked by the public, and if you are a redditor (have a reddit account), you can ask them questions as well or comment on the thread.