Buy Karpov's Best games and pay special note to his games against the dragon, especially against Korchnoi. You can also keep current on the theory with the latest Informants. Chessbase Magazine is a decent alternative.
A good starting point would be Fischer's sac, sac, mate! He said he had the win down to a science, pry open the h-file and... sac sac mate. It's going to be more complicated than that in practice given how Dragon players have incredible memories but white's winning idea is relatively simple and intuitive. Keep in mind that the d5 square is weak in the Dragon too.
Also don't just look on your side of the board:
I went on to win but it was just a casual training game at 15 minutes per side and I did some silly things in the opening.
I'm looking to sharpen my skills when I'm White and having to play against the Sicilian Dragon. If interested, please send me on Online Challenge. My current Online Rating is 1187, but I'm willing to play against any rating. Thanks!