Loblaws rolled out a new rewards program called PC Plus back in May and right now they've got a pretty great bonus offer! For every $80 you spend in a single transaction through August 1, 2013 you'll get a bonus 20,000 points. The redemption value of 20,000 points is $20!
To take part in this offer, you'll have to be a PC Plus member, obviously (sign up for free here) and then manually load the offer onto your card. This offer is valid in Ontario Loblaws locations only and PC Points cannot be earned on tobacco, alcohol, prescriptions, gift cards, phone cards, lottery tickets or third-party operations (like gas bars or dry cleaners). You'll get 20,000 points per $80 spent in a single transaction, meaning that two $40 transactions will not count, but a single $160 transaction will garner 40,000 points.
All points will be credited to your account by August 9.