GiveWell [1] does a lot of research to come up with their list of recommended charities - ones that will have the highest amount of impact for each dollar donated to them.
A couple times every year I look at their top charity and drop a few hundred dollars on them. IMO if you want to maximize the impact of your donation, you can't go wrong with this approach.
A couple times every year I look at their top charity and drop a few hundred dollars on them. IMO if you want to maximize the impact of your donation, you can't go wrong with this approach.
[1] http://www.givewell.org/