In a strange turn of events, several studies suggest that focus is bad for creativity. In one example, Mareike Wieth brought in students during either their most focused or least focused time of day. While focused people tend to do better on traditional problems, they seem to be worse at insight problems.
People who are out of focus actually seem to be better at coming up with new and unique solutions.
To really drive this point home, other studies have achieved similar results from people who were drunk, and even people who suffered an injury to their frontal lobe.