There are many ways to give back, but some rare opportunities require absolutely no effort and therefore fall in the “no-brainer” category.  One way is through Windows Live Messenger i’m Initiative.  Almost everyone has a Messenger IM account with Windows and you can earn money for one of the social organizations on their list every time you initiate a conversation on Messenger.  It only takes a few seconds to sign up and it makes it very easy to do your good deed for the day!