#2 Bringing players from the current Real Madrid side
A lineup filled with the likes of Isco, Toni Kroos, Marco Asensio and many more, they will all agree with the fact that if not for Zidane, they wouldn't have been where they currently are. Not everyone will refuse to play with one of the best in the world, and henceforth, they may follow him to the Old Trafford. Signing players like Toni Kroos or Nacho will bring a world-class stature to the Manchester United lineup, after all, Zizou knows how to negotiate well.
It is however rumoured, that the Frenchmen is already making plans for bringing the deadly trio of Kroos-Benzema-Varane to Manchester.
#1 Tactical re-shuffle
Mourinho's tactics, if laid down on a paper, are all about possession. The more they have the ball, they more chances of winning will emerge.
Zizou's way of functioning, however, is way more different. Understanding how the current generation of footballers function, the former France international knows how to lay down his tactics in terms of high pressing, counter-attacking width-based football, as was evident in his tenure with Real Madrid.
By giving Paul Pogba the sole box to box midfielder role, and allowing the likes of Nemanja Matic and Fred to be the holding midfielders, a 4-3-3 or a 4-4-2 would be the methodology of success for Zidane, winning him matches and bringing him trophies.
In addition, introducing young prowess to the team and analyzing their use, in order to create a discrete mechanism of 'defensive offence' will also help Man Utd win the Premier League.