An important tool in X Factor betting is looking at the official X Factor website 1 hour before the show starts. This will tell you who is singing what song and allow you to hazard a guess at how the contestants will do.
Unless you are directly involved with the show or know someone who is, you won't get better information for betting on.
Strictly Come Dancing has the informative It Takes Two which gives a decent preview of the upcoming dances along with a judges opinion on it. This is in my opinion, essential if you want to make big, consistent money on Specials betting.
We will explore more complex ways to get ahead in the coming months.