DEAL ALERT:
If you're coming by car, park at the Brookfield parking garage (right next to Marche btwn Yonge/Bay on Wellington). You can get a $5 off parking on your ticket with a $30 food bill (on weekends and after 6 on weekdays). They will let you combine multiple receipts whilst paying separately to get to the $30 total.
On the weekends and after 6pm on weekdays, the garage is a flat $10 so after validation, it becomes $5. They'll charge you the $5 at the register and give you an additional ticket to feed into the garage machine to leave.
Super cheap and you can leave your car in the garage for the rest of the day while shopping around downtown!