If you do all the right things, will you get outstanding results?

Not necessarily.

Although competence and hard work are necessary, luck is essential

You will probably, however, not get a bad result.

Whether you achieve outstanding results will depend on the effort and intellect you apply to your investments, as well as on the amplitudes of stock market folly that prevail during your investing career

Warren Buffet, preface to the fourth edition of the Intelligent Investor

I might add to Buffet's quote the fact that you have to be able to take advantage of a market folly.