Faith comes by what is heard, and what is heard comes through the word of Christ.  Romans 10:17

Talk Christ up, speak about Him at a voice level that that may be clearly heard, sign language about Him, send texts about Him, email inspiration about Him, speak something about our awesome Christ in every group in which you participate.  Speak a Scripture about Christ, drop hints about Him, be openly truthful in praise of Him, whisper in a child’s ear that you two love Jesus together, hang a cross and tell others, and have His witness on your coffee mug as you speak of Him rather than talk about the coffee.  Talk Christ up.