I think that there is no well-defined formulas, if there were everyone would be rich. But I'm sure that the first step is manage yourself financially. It is required to be completely aware of your own money and, of course, where your money is going.
managing our finanacially is not easy job, i have tried it more than 5times and failed again.
the problem is we can't remember each of our spending money in 1week, i think daily managing is good option but is consume more time and energy.,