Over on Freakonomics, IPA founder Dean Karlan, shares from his experience in his Economist’s Guide to Year-End Charitable Giving. 

He goes through 5 bad habits we don’t even realize we have, like fooling ourselves into thinking we lived up to our giving intentions. Dean explains how to easily get around them, and how to cheat at giving, but if you're looking for a quick way to meet your goals and know you're supported research-proven programs, there's always *ahem*.