I don't know what the second one he has in mind is; the some of the ones I know are:
1 - operate a profitable business that throws off a ton of cash (these can be huge, like Koch, Cargill, Aldi, and can make long term employees extremely, and privately, rich).
2 - sell part of your company to the public (IPO)
3 - sell the whole company (M&A)
4 - spin out or sell off a division (a kind of M&A)
One major disadvantage of 2-4 is that other people tend to hear about it.