This is a subject I have long wanted to write about but I had no solid opinion up until now.
With the popularity of online review websites such as Yelp.com, I usually read the reviews before going to a business. Often times I read and look for the negative reviews and that fills my head with negative preconception about the business. The preconception is the problem by itself and not the business, at least not yet because it is not your own experience.
Good thing that I still give the businesses a try and often time my experience turns out to be more positive than the negative review that I just read.