[onemoresoop]

That's probably what the "be yourself" advice was getting at. When you try to be someone you're not you show it through your body language, it looks contrived and it's picked up rather quickly. "Be yourself" was probably meant to be more like act less desperate for attention and more confident in oneself, don't try to impress, etc.. But I agree that it is not a good advice to people who do indeed need to improve.

[mattm]

Maybe it should be "become yourself"

[tetris11]

"bootstrap your future now"

or

"reach into the future and pull the best possible rendition of yourself backwards to now forthwith such that you can become thatself once thineself agrees that it is indeed thou that thou wishes to become"

[datadrivenangel]

Believe in the me who believes in you.