Off the top of my head. DO: * Allow them the space/time to talk, say "Take your time". * Complement them on other things other than speech. * Stay engaged with the conversation. * Try to maintain eye contact if possible. * If you see anyone else teasing a stutterer, help step in and stop it. DO NOT: * Complete their sentences * Be impatient * Laugh * Say stuff like, "I stutter sometimes also.."