I have a high efficiency washer, and the repairman (for a recall-related event) told me it is best to use less soap, and always water down the fabric softener. I also cut the dryer sheets.
Eat what is on sale. If chicken is on sale, eat chicken. This week filet mignon is on sale, so I am buying it and freezing it in individual portions.
Know your prices. B1G1 isn't always the cheapest price per item. Same with bulk shopping.
Prep your food as soon as possible to bringing it home. When I buy 9 pounds of sale chicken, within the next 24 hours I cut them into cutlets/strips and feeze in Press N Seal and then in a freezer bag. Makes easy work of making dinner during the week. Time is money.
Always check if there is a lower price on services you already use. I call Verizon to double check my bill periodically, and there has NEVER been a call where they didn't offer me some sort of promo package that lowers my bill. A few days ago I changed to a different type of bundled package (we have Fios) and saved $10/month.
I have also double checked car insurance rates. I switched to a new insurance company about a week after I sent out payment to the then current company. No big deal, the payment was refunded, and I saved over $400 per year. Worth the "hassle."
Stockpile gifts, and don't be afraid to ask about prices. I had to buy teacher gifts (DD has 10 teachers) and went to
Bath and Body Works. Found 7 of one gift set, 3 of another, marked 75% off of $25. Cashier said one of the gifts shouldn't have been marked down - but I showed her where I found it, and there was another of the same kind in there. No problem, it was marked down as well. I worked in retail for 10 years through college (I was on the extended plan, lol) and being nice and polite always helped in any situation where there may have been a discrepancy.
Freecycle. The best Yahoo group ever invented. Ask, and ye shall receive. I sell on eBay and I receive free packing supplies through this group, not to mention toys for DD, clothes for her, etc. I also give lots of stuff away. Really worth looking into.
Will post more as they come to my old brain.
Samantha