People tend to check in during these times:
The presto card reader outside on the langstaff side is broken more often than not. Use the indoor one
Presto Enabled, but it's easiest to buy the cards in person at Union Station in Toronto.
Presto should be arriving soon.
The Langstaff side is way less pushy and crowded
If you arrive here between 10:30am and 4pm, don't bother looking for parking. Its packed.
Buy your tickets before the end of the month if you don't want to wait in long lines.