Another fan of vinegar here - I use it for everything from the laundry (softener) to the floors.
Another thing I started doing recently is to break down my bulk meat purchases into smaller amounts for the freezer. I always broke the packs down into 1# packages (since most recipes we make call for this), but I started making it more like .80-.85 of a pound, often getting another full portion out of the total. No one noticed a difference at all and now when I price out the bulk packages, I do the mental math so that I can break it down within this range - so a 5lb. package of hamburger= 6 meals.
I also learned that refrigerators run less & stay colder if they have stuff in them! LOL, but seriously - if you have a lot of empty room the cold air has to circulate a lot & gets warmer faster (if I remember right) so leaving those empty 12-pack soda boxes when a shelf would otherwise sit empty actually increases your fridge's efficiency.