[Wiseman] gave both the "lucky" and the "unlucky" people a newspaper and asked them to look through it and tell him how many photographs were inside. He found that on average the unlucky people took two minutes to count all the photographs, whereas the lucky ones determined the number in a few seconds.
How could the "lucky" people do this? Because they found a message on the second page that read, "Stop counting. There are 43 photographs in this newspaper." So why didn't the unlucky people see it? Because they were so intent on counting all the photographs that they missed the message.
So what does this mean? From the article:
"Unlucky people miss chance opportunities because they are too focused on looking for something else. They go to parties intent on finding their perfect partner, and so miss opportunities to make good friends. They look through the newspaper determined to find certain job advertisements and, as a result, miss other types of jobs. Lucky people are more relaxed and open, and therefore see what is there, rather than just what they are looking for."
People who we often consider lucky are more relaxed and open to what's going on around them. They're not focused on a single task, blocking out everything else so much that they miss something important and unexpected. What this experiment demonstrates is that luck may not so much be luck, but whether or not our mindset leaves us open to opportunities we would otherwise miss because we're so absolutely sure of what we want.