It's like the 9/12 March On Washington... only slightly more impromptu.
So go to the West steps of the Capitol today at noon and yell at your member of Congress for a while. Go ahead. Try it. It feels great.
And if you can't be in D.C., go to your local district offices at the same time. Tell them you're fed up. If you can't get to a local office, send an email to your local representative right at noon. Do something.