When I first admitted to myself that I didn't believe it was the truth anymore I panicked. I felt for sure that each major world catastrophe was going to be armageddon. As sad as it sounds I would lie awake at night during thunderstorms and be afraid that the end was coming. It was a horrible experience.
But, I realized that this was happening because I hadn't really convinced myself it wasn't the truth. I mentally knew it but my heart hadn't accepted it yet. So I began to intensely study the issues that I felt were out of whack with reality. I chose a handful of doctrines that I knew were wrong and studied them until I could convincingly explain them to others - not a believing dub though, nothing convinces them.
Studying what I felt were glaring doctrinal flaws allowewd me to see how messed up the religion really is. It has also helped me steer my kids and wife toward the exit very very very slowly (hope hope hope).
Good luck.