Instapundit has a list of sites where you can support our troops, for whom we should be thankful not just today, but every day.
And here are a couple sites that you can go to to support our allies, the British troops. Given the current anti-war mood over there, they may not be getting as much support from home as ours are.
If anyone knows of any similar sites for the other members of the coalition, please let me know.