Well, going to Stanford with the goal of making a lot of money is a great start! I think the best thing is to go broad as an undergraduate. CS or EE or something is good because you will be able to go in a lot of different directions when you graduate such as finance or the start-up world. Taking some econ/business courses is good and getting prestigious internships in the private sector is good. As long as you work hard and try to do as well as or better than your classmates you should be in great shape to make a lot of money.
Also, I recommend that after reading this comment you close LessWrong and never look at it again. Some clever post might convince you that you’ll do more good by doing good directly rather than earning and donating. If you buy into that and end up going to work at MIRI or something you could really harm your earning potential!
I’ll flip a coin. Heads I 2-box, tails I 1-box. That’s got to be pretty good in expectation. Gotta make omega work for that 99.9% accuracy!