I give 10 percent of my income to charity. You should, too.

The case for giving away ten percent of your income, and for making sure it has the biggest possible effect. I like how this Q&A is informative, lighthearted and non-judgemental, yet still firm in its attempt to convince you. If you’d like to go deeper on the philosophy behind this: The Life You Can Save, by Peter Singer is a) an excellent book and b) for free.