Karen,

Another thing to consider is that, if your faith is grounded deep in christ, 
you might be better able to witness if you examine their philosophies and 
religions.  Have you ever listened to the Bible Answer Man radio program?  I 
heard someone talking about how, if you are familiar with cults like 
Mormonism and Jehova's Witness, you can say to them, "I've read some of your 
material, and I find something there that bothers me.  What about this 
inconsistency?"  When you do that, it pushes their button to try to "teach" 
you.  When they can't find the answer, they can become flustered, then maybe 
realize that something is terribly wrong with their beliefs.

Sharon