One must take personal responsibility for their life... I learned this by being a student of Responsibility Centered Leadership(www.rcl-inc.com) and further implementing Living In The Now which includes calendaring real time my intentions and commitments.
It's all how we think before we take action...I believe 100% of my success is up to me and 0% is up to outside conditions.
I also know that while 100% is available it can be hard to always be at 100%. I also know that as the number decreases it means I'm letting outside circumstances or conditions become the excuse.