When I feel constrained by the world, I typically think someone else is holding me back or putting a boundary on me to limit me.  Its in my strong willed nature.  Most of the time, its me limiting my self, and I just need a good look in the mirror.  Sometimes its someone else, either way I find having determination and persistance (and a little bit of fight) is the best way for me to break through those boundaries and be the person I was meant to be.  Whats your fight song?  (mine turned out to be Boundary Layer!)