The Best Way to Help
Go to The Salvation Army for the most cost effective way to help the people in Haiti. They need our help and in this economy it's difficult, if not impossible, to give when you're having trouble making your own ends meet. That being said, Americans are a generous people and we help people out because it's the right thing to do even when we can't "afford" it.
Every charitable organization in the world, including the United Nations and even some governmental agencies are going to be asking you for money to help in this cause. It's a worthy cause, to be sure, but before you give them your money discern how wasteful they are with the money they already have been given (or taken, as the case may be).
Give what you are able to give. The widow's mite will go farther at Salvation Army than virtually any other organization of its magnitude. The desperately destitute people of Haiti are begging the world to come to their aid; The Salvation Army, along with our prayers, are the best way to help those needy people.