I remember reading Bill Gates's own writings on how he chooses where to put those money. He has a very clear and developed strategy; it's basically investment e

I remember reading Bill Gates's own writings on how he chooses where to put those money. He has a very clear and developed strategy; it's basically investment except that the profits come back not directly to to Gates, but to the society as a whole. He doesn't just spend the money, he tries to find the spots where applying money would give the greatest and most lasting effect. For example, his donations to malaria researches nearly doubled the overall money that went to these researches over the world and it's not that his donations were so huge, it's just that these researches did not get much funding (compared to the effect of malaria). Similarly, he wanted to fund a program in education of teachers, but he specifically picked a program that looked it could make the greatest profit/expense ratio: filming great teachers as they work and distributing these films to other teachers. That said, I'm sure Mr Gates will be very interested in hearing any sound businesslike proposition in regard to where to invest his money :)