There really is only one way, which is to follow the CM's to the ride. When we did it this summer, we had a rude tool bad in the mix with him. I was a bit behind my wife and son, and to their right. This young woman was nearly directly behind my son, who was pretty well at the front of the crowd, and her boyfriend to her left. I actually heard him tell her to push the boy out of the way, and then go on to say if you won't do it, trade spots with me, and I will. They traded spots, as he suggested, so then all 6', 270 pounds of me took position behind my son. Needless to say, it wasn't my son that got pushed out of the way. Said gentlemen then crossed behind me in an attempt to get past us on our right. Crossed so closely behind me that he took the heel of my right shoe off on his way through. Unfortunately for him, I managed to keep my shoe, and keep walking, and he tripped in the process and lost a few spots in the line. I felt that was a well deserved outcome.
I guess then my advice is, get to the front of the group, or at least as close as you can, be sure you are following a Test Trac CM (we stood and had a conversation with one while waiting for the rope to drop) and then hold your spot in the crowd.