Reasons you might fail:
1. You run out of time
2. You run out of money.
3. You get scared.
4. You're not serious about it.
5. You lose interest or enthusiasm or settle for being mediocre.
6. You focus on short therm instead of long term.
7. You pick the wrong thing at which to be the best at.
--Seth Godin in "The Dip
If you haven't had a chance to read this little book, The Dip
, I highly recommend it. It's about quitting, thus it's about success.