EFF's update also has a handy form to contact Congress. Their summary:

"Yesterday, the House of Representatives voted against considering a largely bad bill that would have unacceptably expanded the tentacles of Section 702 of the Foreign Intelligence Surveillance Act, along with reauthorizing it and introducing some minor fixes. Section 702 is Big Brother’s favorite mass surveillance law that EFF has been fighting since it was first passed in 2008. The law is currently set to expire on April 19.

Yesterday’s decision not to decide is good news, at least temporarily. Once again, a bipartisan coalition of law makers—led by Rep. Jim Jordan and Rep. Jerrold Nadler—has staved off the worst outcome of expanding 702 mass surveillance in the guise of “reforming” it. But the fight continues and we need all Americans to make their voices heard. "