For me the fastest way to earn in mturk is how fast you can complete the hits. If a 5 cent hit takes 30 seconds or less then that's a great hit for me because then I would be making $6 an hour by working on that group of hits. One of such zappity zap hit is when a requester asks for a company's contact address and I love them for I can do them all day and have earned around $30 and more in a day. Please share your hits of these kinds.