How do we identify the cliches from phrases, quotes, quotations, proverbs and other popular dialogues?

The overused nature of the expression usually confirms
that it is a cliche.  For example, when one hears a politician say, "We are going to
study the problem," or an athlete say, "We are going to take it one game at a time,"
these expressions might be valid but they have been so overused that merely hearing them
causes the listener to tune out to a certain extent.  Popular dialogues might be seen as
popular because they have not been overused.  Over time, they might be overused, making
them cliche.  For example, "Where's the beef?" was a popular expression in the 1984. 
When it was used in a Presidential Debate in 1984, its zenith was reached. Afterwards,
it was featured in many more commercials.  Over time, when it was used, it almost seemed
bland in the fact that the cliche nature had been revealed in that it had been
overused.  In this example, a popular dialogue ended up becoming cliche.  Clara Peller's
statement might be a good example of a cliche that can emerge from popular
lexicon.