Similar to calling your representatives, attending town halls is an effective way to make your voice heard.

Town halls are events where a member of Congress answers questions from members of the public. These aren’t scheduled in a consistent way. You might have to check the website for each member of Congress to see when/where a future town hall will be held.

Indivisible has a good resource on how to get the most out of a town hall, as well as a directory of future town halls.