I lurked for quite awhile before I got out.
First, I had to leave mentally... I knew it wasn't the truth and the research proved this to me. I read everything I could get my hands on, and started to form my own "spirituality"... allowed myself to question. I felt if it "was the truth" it could stand up to the scrutiny (it didn't).
Then I started to build an outside support system. Friends. My workplace helped alot, and I started to associate with people (who today still are my friends).
I talked about my doubts and feelings to a sibling and LOW & BEHOLD, she was feeling the same way. We made the break together... but I was prepared for the worse. Our family shuns us, however some keep secret contact.
My meeting attendance dropped slowly over all this time, I avoided the elders, and got my service hours to drop over time until I was "inactive".
Once I was ready for the complete break I made it official. Not to play their game - but for me it was a sense of "closure". I can say that I am no longer a Jehovah's Witness.