#1 Learn from past mistakes
In the last five seasons, Barcelona have faced a quarter-final exit four times in the Champions League. The only time they advanced past the last eight, they went on to win the Champions League, and the treble.
It is clear that the squad loses its focus right when the big games start coming. Performing well throughout the season, Barcelona fail to hit the accelerator in the months of late March and early April. On the other hand, Real Madrid hits the gas right when the Champions League comes calling.
The night in Rome was one of the most embarrassing moments in Barça history. Giving up a 4-1 Camp Nou lead, Barcelona went on to lose 3-0 to AS Roma, the underdogs. Even after getting one of the easiest tie of the round, the team failed to capitalise.
The season prior, after doing the greatest comeback in Champions League history, the team went to sleep against Juventus in the first leg and couldn't score a single goal in the second leg. In the 2015-16 campaign, Barcelona gave away another home advantage to Atletico Madrid.
It is clear that the team needs to arrive in the closing section of the season at their highest levels of fitness and concentration.
They can't afford to take any opponent, or any match as a walkover, and definitely not after talismanic forward Leo Messi made his intentions clear of not settling for anything less than a Champions League victory.