Shop at Aldi.
Always take a packed lunch and a bottle of water with you to work/day out.
Find the free parking spaces near town and park there, you only get 30mins but it makes you really fit walking in and out fast.
Shop at Homebargains/savers/poundland for anything the supermarkets rip you off for eg sweetener tablets, delicate laundry wash etc. I have a good browse so I can spot bargains eg homebargains do lovely sundried tomatoes for a £1, plus artichokes and grilled peppers.
Look on freestuff junction and free-stuff for free samples of stuff eg toothpaste and sanitary products come up a lot.
Amazon do sometimes have the vitamin tablets you need cheaper than the supermarkets.
Sainsburys do basic tea bags which are really good as are sains basic bio powder.
Try all the basic/smartprice ranges to see what you like. You'll be surprised, esp the cleaning products.
Anything you need look on ebay/amazon first.
Find your local farm shops, I only pay 60p for 5lbs of wilja potatoes and £1.80 for a dozen eggs, laid at the farm by the chooks who peck around all day.
On christmas eve, around 16.45 hang around the fresh poultry aisle in your fave supermarket. Then you can get your xmas turkey half price. You wont be the only one there either. 
Look up your favorite local pub/rest etc on the internet for money off/free pudding/glass of wine vouchers. Dh loved me the night I got him 4 free pints of Peroni. Bloody should do as well at £3.10 a pint.
Use the card factory shop for cards, nice cards for pennies.
Use tesco daisy dishwasher powder for the dishwasher, one level dessert spoon does a full wash for me. Savers/homebargains do cheap rinseaid that has the same active ingredients as Finish.
Use smartprice vinegar to descale your kettle, pour it in neat, leave for an hour and pour in back into the bottle. Lasts for ages. Cant believe I used to pay £1.50 just to descale a kettle.
Cant think of anything else right now.