So basically it's very simple: to start with, if you want to win the match, you shouldn't be afraid of him. There are still many, many things to do, but above all this is the most important: Don't be scared of him!
Vladimir KramnikPart of my preparation for the World Champion match against Kasparov was to be ready for his off-board tactics. I did not to react to them at all. Once you start thinking about these things during the game, even analysing them, you're caught.
Vladimir KramnikIt is rightly said that the most difficult thing in chess is winning a won position
Vladimir Kramnik