Is be yourself a cliche

The term 'be yourself' is very cliche, but that doesn't mean you shouldn't listen to it

Well, you certainly have heard it often and it sounds, at least to me, a bit trite.

You hear this advice, particularly if you are so unfortunate to be an insecure teenager, quite often, and if you want to say anything relevant I would recommend something less superficial and some advice or phrase which is original.