This is a topic that's come up around me many times over the past week.
I believe that we need to be able to talk about our faith in simple terms. Not simplistically; simply. (Ravi Zacharias said in last week's podcast, "simply is different to simplistically". He gives a good description of simplistic theology and its dangers).
Think of the words you use when you talk about your faith. Think about how you talk about your God and Savior. How many of the words you use are only used by 'church folk'?
Sometimes I wonder if 'Christianese' is a secret code that snuck its way into our Christian culture so that we can talk about God without anyone knowing what we are saying.
Be honest (in love). Be direct (not blunt). Avoid big words (don't water anything down). Use stories. Ask questions. Be passionate. Get involved. Quote scripture.
This last one is the most important. As we memorize God's Word, it becomes a part of us. It nestles down right into our heart, acting like salt and seasoning all of our conversation. Then it can accomplish God's purpose.