Summary. Charitable giving is one of the easiest ways to have a positive impact in the world. When donating money to charitable organizations one wants to be sure their money is having the greatest impact possible. Below are some resources to ensure greatest effectiveness in giving. Some of these are charitable organizations. Others are websites that review such organizations. In addition to these links, we also have a document that explores how much to give, “Giving a Percentage – Donate, Contribute, Give, and Volunteer to Charity for Greater Wealth and Well-being.”