Many people know about GiveWell and their top-ranked charities. But how easy would it be to make a better one? In "Why It Should Be Easy to Dominate GiveWell's Recommendations", Rob Wiblin notes the simple solution -- fundraise for whatever organizations GiveWell recommends, and raise more than a dollar with each dollar you receive.
Edited on 22 July 2013 to correct a mistaken citation.
That makes sense - I guess you need to clarify that fundraising is more quantifiable than recruiting or development of technology (a la Leverage).
Also more quickly quantifiable then movement building (my previous EA plan) or getting pledges (Life You Can Save or GWWC).