My first idea is about buying meat.
I always buy meat when it is on offer and freeze what I do not use. Over the last couple of years the supermarkets have been doing some really good offers on roasting joints especially pork and beef. You can get pork for around £2.50 per kilo for leg and £4.50 per kilo for beef which is approx half the normal prices.
With the beef I buy the biggest joint I can afford and cut them into varios sizes for the freezer. Small roasting size usually then I can defrost and use as I wish
I usually do the following if buying top rump, I will cut two steaks and two roasting joints.
I mince my own meat I know exactly what is in it and absolutely no fat! Believe it or not to do this actually cheaper than to buy lean mince from the supermarkets and as already stated you know exactly what is in it!
I cut some into cubes for stews and also into very small dice for pasties. This is also cheaper per kg than buying ready cut stewing beef and you also have a far better quality of meat.