Continuing with how we stay on our grocery budget ... cleaning supplies.
The only household cleaning supplies I buy regularly are Windex, Mr. Clean Magic Erasers (how did I live without these? With 3 boys in the house and my affection for white walls and furniture they're a staple.), toilet scrubby wand and pads, and Swiffer wet mop for the upstairs bathrooms. I tear off pieces of the Magic Erasers, if I need more I grab another piece but most jobs aren't that big.
I will buy a few other cleaning products if they're dirt cheap (like practically free), but most of them are pretty unimpressive.
For most everything else we use either baking soda or vinegar ... but not together ... unless you're making a volcano, which really is very entertaining, except that now whenever I get one of the two out to clean the kids clammer for a volcano.
Dishwasher detergent I buy when on sale and combine with coupons.
Laundry soap I buy in a gigantic tub at Sears. It goes on sale ... ends up being about $.07 per load, if you use the recommended amount. It's great for our HE washer and lasts forever. I use about 1/2 the recommended amount and have never had a problem. Dryer sheets ... after some trial and error I use Bounce sheets cut in half, so half a sheet for each load.
Ok, I think this is the dullest post ever.