Not willing to blow 12 bucks on popcorn and Kool-Aid? Join the club. Plenty of people bring their own snacks to the movies; it's just a matter of knowing where to get the good stuff. Heading to Canada Square or SilverCity Yonge and Eglinton? The legendary chocolate buffalo at What A Bagel will give you the sugar boost to get through whatever Ben Stiller's doing on-screen.
Going to the Varsity? The Valu-Mart downstairs sells fresh sushi from Bento Nouveau - which we rely on for sustenance during marathon TIFF screening days. Or, if you're feeling daring, you can pick up an Italian sandwich at Scaccia. (They're drippy, so expect a few stains.)
Tragically, the Sandwich Box up the street from Scotiabank has packed up and moved to Yonge and Eglinton. The Sandwich Tree, just next to the NFB Mediatheque on John, is a good option but closes pretty early.