It is not native intelligence or natural talent that makes people excel, say Linda Kaplan Thaler and Robin Koval--it's old-fashioned sweat equity and hard work. And that claim is backed up by new research from MacArthur Fellowship Award winner and University of Pennsylvania psychologist Angela Duckworth, among others. Not everyone is blessed with exceptional intelligence, or wins the gene lottery. But the good news is that you can excel beyond your wildest dreams in your career and your personal life--success is within your grasp--through the right attitude and determination.