you need to get in as an intern or work with someone who sometimes posts up here on the RPF trying to help people get a foot start in the industry. The main stranglehold of major films and tv shows are the established prop masters. It takes one to either leave the earth or retire before someone else can step up. Most of these people have agents or are, so to say, "in bed" with someone on production whether it be a lead actor, production coordinator or producer. Its a very insecure line of work considering you are self employed and only as good as your last job. If the work dries up or you drop out of the loop, its like starting all over again. In other words, have a back up plan to eat and pay bills. If you into working for money, drive fancy cars and wear the latest clothes, your better off working at the Gap. Art dept is the most important aspect of a film/tv project yet one of the most disrespected lines of work in the industry. Oddly enough, its also the funnest.