Actualy, deprogramming is about that person find out what is her/his programming, and open that programs before they are activated.
To find out that you can ask for the help by some psychic, or you can through your own self analysis make some logical conclusions, but in this case you will need very good literature on the subject you are going to explore.
Third option would be meet with the person who has authority to access to top-computers that hold informations connected to our programming. That are able to do some highly positioned Illuminati members.