Luck and intelligence are the only things I didn't pick. Although determination and single-mindedness aren't the same things, and I wouldn't pick single-mindedness necessarily.
Luck favors the prepared. Some people are truly lucky, but often what appears as 'luck' is actually the fruit of a great deal of labor.
Some degree of intelligence is necessary, however I don't think it's as important as many people believe.
You also forgot "Vision". How can you be successful if you don't have a vision of what success is?
I use the 3 "P" rule:
Planning. Perseverance. And some other thing that begins with "P".