If you have the cash (or good FaMa sponsors), learn how to invest & invest well. There are many venues, from stock to property & etc.

If you don't have the cash to start & you don't mind conning people (legally), then get into one of those MLM's (LB, etc) that emphasize more on 'the plan' than the product. It'll get you to your mark pretty fast.

If you don't have both the options, invent something that would make life as you know it change for the better & patent it...

My 2 cents