I would be interested to hear how HN readers approach charity. I personally am constantly struggling with questions like: once my basic needs are met, how can I possibly justify not giving the rest of my income to life-saving causes?
My working theory is a combination of (a) my basic needs are actually quite high when you consider the many potential rainy days for which I must save, (b) I don't know enough to donate with confidence that my money is doing more good than harm (this Gates letter addresses some of my concerns here), and (c) I must simply come to terms with being selfish to the point where I would rather spend money on a candy bar than a life-saving vaccination for someone else.
Personally I don't believe that you need to save the world. Just making a contribution now and then and being aware of the issues and speaking / voting with empathy for the poor is enough.
If you want to know enough to donate with confidence, GiveWell has good charity recommendations.
In any case, don't let indecision paralyse you into inaction. Put some proportion of money aside for charity, start doing research, etc. We're not perfect, it's okay to be a bit selfish, and it's good to want to do better. There's any number of options between a spartan life where you donate most of your money, and donating nothing.
My working theory is a combination of (a) my basic needs are actually quite high when you consider the many potential rainy days for which I must save, (b) I don't know enough to donate with confidence that my money is doing more good than harm (this Gates letter addresses some of my concerns here), and (c) I must simply come to terms with being selfish to the point where I would rather spend money on a candy bar than a life-saving vaccination for someone else.