The images from Haiti are almost impossible to comprehend. So many of the people there had almost nothing to begin with; how on earth can they get through this? I can't imagine what those people are going through right now. Horrible. I don't have words.
A few helpful links, in case you have not yet identified ways you can help:
How to Use Tech to Make a Speedy Donation. Helpful tips from PCWorld.
Charity Navigator offers some suggestions for how to make sure your donations go where you intend them to, and how to select the most effective places to donate.
Doctors Without Borders is where I'm sending the donation that I wish could be so much larger. They do good work, hard work, and as far as I can tell they manage their funds reasonably well. Also I believe they already have a presence in Haiti, which helps.
Oxfam America is another good place to donate.
I will admit that I haven't researched Yéle Haiti as thoroughly as I'd like. It's a smaller organization, and less well-known. But it has been in Haiti for a while, it seems to be reputable, and they make it very easy to give a $5 donation via cellphone simply by texting YELE to 501501. $5 isn't much, but a bunch of tiny donations can add up.
You can also donate $10 to the Red Cross by texting HAITI to 90999. The Red Cross has been criticized for spending too much of its money on administrative costs, and I still hold a bit of a grudge against them for their homophobic policies regarding blood donation. But they know what they're doing when it comes to mobilizing emergency assistance, good people work for them, and they are on the scene.
Someone I know recommends Partners in Health, another grassroots organization that has been in Haiti for a while and has built up relationships there.
And clicking on the logo below will take you to some information provided by the White House.
If you are in a position to help, please do.