Food is always my biggest saver. I make more from scratch as it's heaps cheaper. Also chicken meals and meatless meals are great savers. I make lots of stews as well as you can buy cheaper cuts of meat. Make my own snacks and freeze them. I made some wholemeal pumpkin spinach and cream cheese scrolls last week and making some cheesy veggie muffins tomorrow (not to mention heaps healthy) oh and pop corn is the cheapest snack ever will try to make some muesli bars next week.
I also use a drying rack in DS's room next to the heater at night instead of a dryer if it's too wet or cold for washing to dry. Kills two birds with one stone DS stays warm and washing gets dry.
That's all I can think of for now