I recently saw an article entitled "Do your friends make you fat?"
I was horrified.
It was a catchy title, but it clearly pointed to the fact that we have developed a blaming culture, one that doesn't always encourage us to look in the mirror. Personal accountability requires us to look in the mirror.
Personal accountability is key to effective leadership. Whenever you encounter a problem, if you can train yourself to say "what was my contribution to this problem?" you can start to take action on the pieces for which you are accountable. Fixing others and blaming others is always a no-win approach.