Firstly
WELL DONE on the promotion Jocelyn. You're a wonderful human being and you deserve some good things in your life right now

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Secondly, in regards to food budgeting, this is part of a response I gave to someone else a few months back which you might find useful

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Things like
1. Red sticker promotions
2. Blue cross promotions
3. Fixed percentage discounts.
4. "Upto" percentage discounts.
5. Buying in bulk from farmers markets.
6. "Downshifting", which means buying own brand not branded goods. However this may not yield a good taste comparison every time.
7. Sometimes supermarkets pitch stuff out and let you have it for nothing.
8. Priced to clear items, either in bargain bins or on the sell by date.
9. Shopping around and walking to stores in close proximity. Good exercise and saves a bit of money potentially.
10. Some places raffle returned stuff off, but sometimes it's pot luck. I.E. a tin with no label containing peaches, instead of soup like you wanted.
11. Buying damaged products I.E. dented tins, but the inidividual should make sure they don't damage stuff on purpose.
12. Large boxes of cereal, to get better value for money.
13. Coupons out of papers, magazines or coupon books.
14. Buying online for discounts, but beware the faceless corporation incase of difficulties arising from this.
15. Free stuff. An example being Kefir growers who often grow so much, they will send some to you gratis. Admittedly though I cannot think of any other examples, apart from hampers won in raffles or given to the zillionth customer in-store and those may contain some questionable food items, depending on what's in them.
16. Market stalls may be able to beat store prices.
17. Good old fashioned haggling on price.
18. Extra free items that say one or two extra in the container, or n% extra free in the container.
19. Farm shops may be able to beat store prices.
20. Grow your own. Minimum startup cost, requring bulbs and seeds. if you have the soil, nothing else may be needed, otherwise growbags will be required, or various amounts of flowerpots.