We've coined a new term- "one-click mitzvah." This refers to an easy way to use technology to give to others. There are many sites now set up to donate money based on a number of visits (or clicks) to the site.
All of our computers in the computer lab are set to "The Hunger Site" as the homepage. Students all know to "click to give" whenever they open the browser. Many of the students will take the extra time to click across the top navigation bar to go to all of the listed sites.
Sometimes I open the browser when showing something to students and forget to click to give. You can be sure the students ALWAYS remind me.