I'm asking specifically what field I should go into; perhaps that wasn't clear enough.
Your suggestion is not correct if my intellectual contributions would be more valuable than any or most monetary ones I could make. But don't think I have not considered the opposite, too; to that end, what's the best way to make money? Economists aren't as rich as I would have guessed.
If your passion is science, if at a gut level you believe that's where you can make the best contribution, do that. Making real money takes a hell of a lot of drive; it's not something that's at all likely to be accomplished by following the steps because you've been intellectually persuaded it's the course of highest utility.
The same is true in reverse, of course; if your passion is to start your own company, do that and donate money to immortality research.
In other words, don't try to choose in the abstract the career of highest utility. Choose from among those careers with high utility, that one where you have comparative advantage; and listen to your gut about where your comparative advantage lies.
I was immensely glad to find this community, because while I knew intellectually that I was not the only person who felt that rationality was important, death was bad, and technology was our savior, I had never met anyone else who did. I thus determined my career without much input from anything except my own interests; which is not so bad, of course, but I have realized that I might benefit from advice from like-minded people.
Specifically, I would like to know what LessWrong thinks I should do in order to get into "immortality research." Edit: that means "what field should I go into if I want humanity to have extended lifespans as soon as possible?"
I feel immortality, or at least life-extension, is one of - if not the - most important thing(s) humanity can accomplish right now. I don't think I am suited to AI work, however. Another obvious option is an MD, but that's not in my temperament either. My major right now is biochemistry, in preparation for a doctorate in either biochemistry itself, or pharmacology.
I think there's a good chance that advances in this area could contribute to life extension; aging is a biochemical process, right? And certainly drugs will be involved in life extension. But is this the best place to apply my efforts? I have considered that biogerontology (http://en.wikipedia.org/wiki/Gerontology) might be better, as it is about aging specifically; but I don't know much about the field - only that Wikipedia says it is new and very few universities offer degrees in it. My final idea is nanotechnology of some kind; I believe nanomachines may be able to repair our bodies. I'm not sure what type of nanotechnology I'd be looking at for this, or if degrees in it are offered.
Any ideas, suggestions, or comments in general are welcome. I favor the biochemical approach as of now, but only through temperament. As far as I know, AI, biochemical/pharmacological methods, and nanotechnology are all about equally close to giving us immortality. If someone feels one option is better than the others, or has recommended reading on the subject, please share!
Thanks in advance, my new rational friends.