• clinching more, weighing him down
• keeping him against the ropes longer
• taking more chances
• more uppercuts like that epic one in the middle of the fight, damn
• being faster
• being more effective

Margarito put up a good fight though—anybody who could last 12 rounds against Pacquiao deserves respect and commendation. Kudos to you, man! And Pacquiao, awesome job as always :D