[rich_sasha]

I'd add two more:

1. Luck. Plenty of lucky successful people out there. Not to say only luck gets you there, or that luck alone is always enough, but it makes a massive difference.

2. Lack of understanding of risk. Probably not an overall good thing, but a common thing among successful people (IME). Quite often the backstory involves some hideously crazy risks the person took at some point that paid off, but the cost of failure would have been unbearable.

[Modified3019]

And to that last point, we don't hear about everyone who took the same risks and failed miserably.