How To..?

* Up my confidence level, in all aspects life and self?
* Up my value of self-esteem?
* Say "No" and be firm about it, yet not offending or disappointing anyone on purpose, unless they deserve it?
* Be nice and not be used?
* Be / feel more worthy / good enough?
* Umm.. maybe adopt the following attitude: "Don't like me? Cool, I don't wake up everyday to impress you."

Sigh, never thought these kinda things still troubles me.
I guess I am really going through some kinda quarter-life crisis.
Oh blimey!!