Draft well, sign carefully selected free agents, perhaps a judicious trade...
But you do ALL of that with the salary cap in mind... so again, before you go talkin' about trading away Roy Williams, all because he's become your designated scapegoat for everything that is wrong with the Cowboys, then it is incumbent on you to at least research what kind of a cap hit such a move would result in...
So tell me, what kind of cap hit do the Cowboys incur if they trade Roy Williams?? You don't have the first clue, do you??
Until and unless you can answer that question, I'd go easy with insulting posters who CAN answer that question, because they'd clearly be closer to a "real genius" than you are...