When charities want money to help people and you don't have any, what do you do?

Everyone says "volunteer your time instead," but you only have so much of that, too. If you can't spare money, you probably also can't spare time from earning money for essentials. What other ideas do you have on how to help those in even worse situations than yourself?
Update: Some excellent ideas here. Yarnlady's link is a total wow! I'm going to extend the deadline and see what we can dig up.
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