There's an interesting article in the Daily Gamecock about students raising awareness for the homeless. It mentions a homeless man named Roy Gleiter who makes hemp jewelry and gives it away to passersby, asking only a promise in return for each piece:

The first piece comes with the promise to help five homeless people and tell them that a homeless man told you to do it.

The second piece comes with the promise to help five people, and ask them to help five homeless people.

The third piece comes with the promise to help five children and ask them to help five homeless people.

The fourth piece comes with the promise to help five people you do not know, and the fifth promise is that whenever you come into contact with members of the media or Legislature, recipients tell them that they support homeless and poverty rights.

So, how can we answer Roy's call to action? Perhaps a good place to start is the National Law Center on Homelessness and Poverty, as mentioned in the article.