#1 Mentality

Despite Manchester United's late comeback against Crystal Palace, there's some truth to this.
A number of times this season, Manchester City have had their backs against the wall and they've dug deep, stuck their heels into the ground and gotten themselves a result. Some people call it lucky, but Manchester City have done it too many times this season for it to be a fluke - and Ferguson's United seemed to do it every other week.
The reason City have been almost unbeatable this season isn't just because of their brilliant football (which is obviously a huge factor), but the way Pep has conditioned them to perform. Had City conceded to Newcastle in the 65th minuted and gone one nil down, there is absolutely no way that was how the match ended.
City's one loss in the Premier League this season involved them coming from 4-1 down to 4-3, and even then the final few moments were nail biting.
While United managed to pull a late one out of the bag against Crystal Palace, one game simply is not enough. They need to play the game with a winning mentality from the moment the whistle is blown till that final three bursts.
No more dodgy first halves, and no more giving up when the team goes a goal or two down. Their comeback performances against Palace and Chelsea were certainly inspiring, and they need to show the attitude they showed in the later parts of these games all the time, if they want a decent Champions League run and to finish second in the Premier League.