Common Myths

Jared Wilson has a great list of myths common in many churches: http://gospeldrivenchurch.blogspot.com/2009/08/25-evangelical-myths.html

I just wanted to add a couple more - very common amongst non-christians:
When you die, unless you were a really nasty criminal or something, you go to a "better place"

When you die God weighs up all the things you have done - good and bad - and if, on balance, the good things outweigh the bad then he lets you into heaven