Baking soda is second only to vinegar for household verstility. Here are some ways to use it:
Shampoo alternative (See Poo-Free)
Use instead of toothpaste!! (It's salty but non-toxic! Makes my teeth feel really polishy)
Cleaning bathtubs: I sprinkle a bunch into my bathtub, add vinegar (with tea tree oil in it), watch it explode and then scrub with an old loofah. Takes elbow grease if you're like me and only wash the tub about twice a year but again, non-toxic.
If your cloth diapers are smelling like ammonia after drying or immediately after your baby pees on them, you can toss your diapers into a washer, fill with cold water, add 1/2 of baking soda and let soak for a few hours. Baking soda neutralizes the pH of urine. I don't recommend this to be done on a regular basis, however, as soaking increases wear and tear. Especially on natural fibers.
For those that use normal shampoo: add to shampoo once or twice a month to get rid of build up (a hairstylist told me this one)
Gentle yet effective cleaning scrub for counters, sinks, fridges, pretty much anything!!
Gentle scrub for faces (I hear it works great for acne!)
Baby wash (a completely non-toxic way to clean. It makes their skin sooo soft!)
Use as a carpet freshener
Homemade electrolyte drink: 4C water, 1/2 tsp salt, 1/2 tsp baking soda, 8 tsp sugar
Rashy baby butt soak or sunburn bath soak (it has amazing soothing qualities)
Can also be made into a paste and applied to burns and beestings
Mixed w/vinegar to unclog drains (pour a bunch of baking soda in, followed by vinegar and seal the drain while it explodes)
Kills smells in fridge/cooking surfaces
Grease absorber- can be used to clean ovens and microwaves
Puts out grease fires
Sprinkled into a diaper wetpail/bag or garbage can, will help reduce odors
Sprinkled into shoes, will absorb stinky foot smell :-)
Add 1 cup of baking soda with liquid laundry detergent for extra cleaning power
Use as a deoderant by dabbing some into your arm pits (haven't tried this but I would :-)
Sprinkle a bit into a vase of flowers to help them stay fresh longer
Get rid of the mildewy smell in dishrags and towels by soaking them in baking soda and water
Sprinkle some in dishwasher to improve washing power
Make a volcano in your kitchen!
I know there's more!! If you have a favorite use that I haven't mentioned, feel free to post into the comments!