The only real, safe way: Get a good job, work hard at that job, get promoted to the top, live within your means and save everything you can. From there you take care of your assists and put funds wherever you think offers the best lowest risk to reward ratio. It is as simple as that. 
that's the hard past, i preusme he is intending how you do it easily, because otherwise everyone would be rich by this point
a regualr job will not get you anywhere, you need to have luck basically, at least a big portion from your money usually come from luck, when we talk about rich guy(they were lucky with their career yes)