Some of my suggestions:
~Go through your checkbook and credit card statements, and see what things you have purchased that are not necessary in the past. Do you have a regular coffee and muffin habit at Starbucks? Do you go out to dinner often? Do you often have a beer or a glass of wine at a restaurant or bar? Do you often buy new nail polish or lipstick colors when you still have usable ones at home? These little things here and there might only be $3-$5 each, but over the course of a month's time they can easily add up to $20, $40, or $50 or more!
~Switch to store brand products whenever you can. You are going to save 5 cents to a dollar on every item this way...and the green beans or cotton swabs are going to be just as good.
~Shop clearance racks ALWAYS. I don't buy my kids clothes for full price. I shop the clearance racks, outlet stores, or go when I have a 15-30% off coupon somewhere.
~Get the Sunday paper, and clip coupons. Look for coupons online for your favorite items and print them off. I save $5-$20 per WEEK in coupons! That adds up over time. If I have a coupon this week for Pampers, then I buy that brand...but next week if I have a coupon for Huggies, I will buy that brand instead!
~Shop eBay! I have purchased many holiday gifts, clothing items, dvds, books, etc. on eBay for less than retail. You just have to shop around a bit!
~Turn the thermostat down when you are not home. When you leave for work, turn it down to 60 degrees. When you get home, turn it back up to 65-70 (wherever you like to keep it) and it will warm back up within an hour. There is no reason to keep the house toasty when you aren't there. Also, if you normally keep the house at 70 degrees, consider keeping it at 68 this winter and wearing a sweatshirt!
~Look through the grocery ads, Walgreen ads, etc.
~Get basics like canned veggies, frozen veggies, flour, sugar, etc. at discount groceries like Aldi.