What an interesting thread...and some cracking replies.
I was asked on the ministry by a young priest how do I know the JW's teach "the truth" since we never check against other sources...it was a good point and we had a good chat about it and he pointed to the date of the destruction of Jerusalem as an example.
So for months I got up at 6am and researched for 2 hours prior to going to work and naturally I eventually had to concede that 607 cannot be accounted for and the only line of reasoning a JW can use is "it must be right as it comes from the GB and fulfills 1914 prophecy".
I was an elder at this point and from here I branched out into other studies until I stumbled on here as a guest, on JWSurvey.com and JWFacts.com.
I spent a few months fighting myself internally until one day it just hit...."this is not the truth and JW's are wrong".
After I came to that conclusion the rest was easy...resigned as an elder...stopped going to meetings...took me a few months to get mentally out but now I'm the happiest I've ever been.
I've also come to realize that if others are to do the same in my congregation or my still-in family then they too must do the journey I did, me telling them does little, all I can do is point them to areas and subjects to research.
But I'm not bitter about it all...I learned some life lessons and developed better social skills but naturally you can do this in a better way and now the hard part is to get my wife and kids out.