You can call your members of Congress right now on one of these toll-free numbers, 888-818-6641 or 888-355-3588. There are operators on duty 24 hours a day. Just ask to be connected to either of your senators or your house member and they'll put you through.
Or go here for a simple form.
PS: Don't forget to urge your members of congress to support Rush Holt's "The Voter Confidence and Increased Accessibility Act" (H.R. 550)
Sign the petition here
Tell your congressperson here.