I read an article about Vanita Parti, founder of Blink eyebrow bars in the Times earlier this month - How I Made It - and loved her advice to would be entrepreneurs: "Be unashamedly persistent. That really got me through the first six months where I had the phone slammed down on me. I thought no, this is going to work and I'm going to convince you."
The same applies to the TV industry: whether you're trying to get into TV, get onto camera or get a programme commissioned. If you've done your research and you really believe you have what it takes - or you have a groundbreaking programme idea - you have to keep going. It might take time. You might get knocked back along the way. But you have to be unashamedly persistent.