It's being associated with people who give their whole time and energy to vital, life-saving work. It's a privilege. It does a lot of good with little means and with a small, determined, well-informed and energetic staff. Be assured that whatever contribution you make will not be wasted. No donation is too small.
Small steps can lead to great effects.
Additionally, you can become a voice for refugees yourself. Politicians and pundits are in the habit of thinking that you, as an American citizen, are not interested or involved in things that happen beyond our shores, provided they don't directly threaten us. Let your Congress members, Senators, Governors, President and your local newspaper, TV station, and radio station know that you have a broader idea of our national interest than they imagine. It will make a difference. Many public servants want to hear from the people they represent as to what is important and when pushed will do the right thing.