I read Grit by Angela Duckworth, and it encouraged me to "Zero in on specific weaknesses and drill them relentlessly." I want to gain...

I read Grit by Angela Duckworth, and it encouraged me to "Zero in on specific weaknesses and drill them relentlessly." I want to gain...

I read Grit by Angela Duckworth, and it encouraged me to "Zero in on specific weaknesses and drill them relentlessly." I want to gain...