Greg Koukl is one of the best Christian apologists to learn from, especially when it comes to practical communication. (His book Tactics: A Game Plan for Discussing Your Christian Convictions is a must-read for all Christians.) You should subscribe to his monthly mentoring newsletters and podcast. A good example is this month's mentoring letter with A Simple Communication Tip. It's also got an audio version (from the podcast), linked below.
Full MP3 Audio here (7 min)