Just my 2 cents ^^
“Only a life lived for others is a life worth while.” – Albert Einstein
Again, you need to qualify this. As a young developer who just graduated from college (or still attending one), you might be full of hope of changing the world and making it a better place. Your idea of "life lived for others" might be helping people who need clean water.
A person with a few years of experience out in the real world, or with a kid or two, "others" for you might be your wife and kids.
I´m single, but my experience with people I know tells me otherwise, unless of course your wife doesn´t share the same desire of helping others, in which case I´d say you married the wrong woman for you.
You don´t need to move to Africa or India to help others. The "others" might be on your same neighbourhood. And thus, helping "others", you end up helping yourself AND your family. You just need to broaden your definition of "others".
Living in Argentina, it´s difficult for me to find a market for an iPhone app, or to try to make money out of a web application. However, there are lots of unsolved problems here, some of which may be addressed with software. The only difference is that it´s much more harder to monetize them. However, I think the extra incentive for me comes in the form of good karma, and building myself a reputation.
