I usually shop at Aldi these days, no special offers, just low prices on most items. I only buy what I need or what I fancy as a treat for me and the kids.
If I go to one of the larger supermarkets, it's only for specific items that I can't get at Aldi such as decent deodorant, razor blades and other non food items, and even then it's straight to the aisle I need, pick up the item and head to the till. I never take any notice of the 2 for £2 or BOGOF offers as they are usually on things I don't need or want.