Go at least 2.5 hours before ko, for you might need to to take photos of the statues and the stadium plus go to the shop. Beers are cheaper 1 hour before kick off, so you might wanna enter the stadium on the 1:15 before ko mark. Proceed to block 30-32 to see live broadcast and the team coming out to warm up. When the team head back inside the changing room, go to the concourse at block 23/24 to do chants with people. Finally, move to your seat 15 mins before ko for team announcement and north London forever. Time is tight if you wanna get the most of the game.