The most important things that lead to success ranked in order:

1. Opportunity
2. Hard work
3. Skill
4. Luck

Opportunity is first because no matter how good you are, it won't matter if you don't have any opportunity. Hard work is next. I placed hard work above skill because I have heard lots of success stories and important people say that hard work will get you further than your skill. I placed luck at the bottom because it is true that you have to be lucky to succeed, but in order to be lucky or increase your chances of being lucky, you need to be hardworking and skilled first.