1. Stop Cristiano Ronaldo
That brings us nicely to the final item on our list, and perhaps one of the more obvious ways in which United can beat Real Madrid - stop Cristiano Ronaldo. If you can find a way to keep him quiet, you're blunting one of Real's sharpest of attacking threats. Rio Ferdinand was rested for the Premier League tie against Everton at the weekend, which means he is practically guaranteed to start at the heart of United's defence alongside Nemanja Vidic with Rafael and Patrice Evra occupying wing-back positions on either side. They all know Ronaldo very well from the 6 seasons they spent training with and playing alongside the goal-machine, and if anyone knows how to stop him, it's them. Quite whether they will be able to achieve that however is another matter entirely, but if they can find a way to put the brakes on his free-scoring form of late, then United will be in the Quarter Finals.