I'll keep this short since most people have it right - the best time to shop at T&T is around 7 or 8pm at night when all of their freshly made foods start to go on sale at reduced prices or 3 for 1. Pick up their sushi or thai fresh rolls or a bag of the baked buns with meats or other goodies inside them. Also the coconut or mango ice bars aren't to be missed. But its true, overall the hot food has definitely lacked in taste since ownership traded hands to Loblaws.
And if you haven't tried sweet soy sauce, make sure to pick it up in the Indonesian aisle!