If you are looking for a way to help in the aftermath of hurricane Sandy, LDS Philanthropies uses 100% of donations to help those in need.
You can read more about how members and leaders of The Church of Jesus Christ of Latter-day Saints are working to help those affected by Sandy. You can read more about other efforts, such as aid sent to refugees in Syria and more of where and LDS Philanthropies funds are used, at the LDS Philanthropies/Humanitarian Services website.