7 Reasons You Might Fail to Become the Best in the World

1. You run out of time (and quit).
2. You run out of money (and quit).
3. You get scared (and quit).
4. You’re not serious about it (and quit).
5. You lose interest or enthusiasm or settle for being mediocre (and quit).
6. You focus on the short term instead of the long (and quit when the short term gets too hard).
7. You pick the wrong thing at which to be the best in the world (because you don’t have the talent).

From Seth Godin’s book, The Dip.