The Hunger Site and its sister sites provide a way for you to give to charity by simply clicking on an icon. It costs you nothing. When you click on the icon a corporation that is partnered with the website has agreed to donate the money. You can only do it once a day but I try to start my day by clicking on each of the sites. Its an easy way to give everyday and it costs you nothing but the time it took to do it. One site gives provides food for the hungry, another medical treatment for children, another is buying up rainforest, another provides books for underprivileged kids, etc.
It couldn't be easier.