Pay attention to the line of impossibility

"Subconscious belief that there is a line you cannot cross -a line that separates the realistic from the impossible- is what keeps talented people from achieving success. If you want to write the great American novel, star in a Tom Stoppard play, or be point guard for the Sparks, just research the usual steps needed to do those things, then embark upon the journey. Whether you succeed or not will be based on your talent, not your drive; that's respectable." (From Pieces of Advice for my Baby Daughter).