[ThomPete]

Many people work hard and never make it.

Many people build great products and never make it.

Many people build a great business but it doesn't last.

Luck doesn't determine whether you are able to make it but it does often have a lot to do with whether you get the chance.

[WalterBright]

If you don't work hard, don't build great products, and don't build a great business, you aren't giving luck much of a chance to help you.

[ThomPete]

If you have a great business you are by definition successful so that makes no sense.

With regards to the other sure but none of them will guarantee you a great business.