1) Get a good enough job, and be tight-fisted enough to invest £10,000 per year. (And, assuming you're working in US dollars or Sterling, you'll be a Japanese Yen millionnaire after the first year, by the way!). . 2) Whatever you invest the money in, you have to ensure that you make a return of 20% each year. Invest in shares, property, whatever it takes.. . 3) After 17 years, you've got 1,059,305 of whatever is your chosen currency!