Start to develop a social circle outside of the organization. Have people over who are not witnesses- neighbors, work associates, relatives etc. You have to have a social safety net before you can feel comfortable leaving.
I agree with what everyone else has said- go slow. Read up on the paranoia, loaded language, and social pressure that keeps a person in the cult. Being an irregular meeting attender helps- it gives a person a few extra days to not be drilled with JW doctrine.
Good luck to you.