Be a single car family.

 If your family can exist on one car, save the insurance, car payment, gasoline, and maintenance expenses of the second car. This could mean public transit is switched between parents in order to allow each person to do the additional errands they need on specific days. Be open minded.

Save on pets.

Don't get a pet. I didn't say to get rid of your pet because that pet is a member of your family. Don't get one in the first place and avoid all pet support and food costs associated with said pet.

Keep your pet healthy. A sick pet can easily become an expensive pet. Feed your pet properly, keep them at an appropriate weight, provide fresh water, exercise regularly, and make sure they get the shots and essentials they need.

Break apart flea drop packets. A rescue group clued me into this one. Take a small glass bottle with an eye dropper top. (Ours came from cleaning drops that belong to the fish tank I believe. health food stores may also sell them for essential oils.) Purchase the pack of flea drops for the absolute biggest dog available at your store in the bulk packaging. Make sure the jar is clean, then break open and pour the individual applications into your jar. Typically the price is nearly the same no matter the size of the dog and we were able to get 2 years of appropriate drops out of a 6 month package. Here is a much more precise explanation. http://www.starlightbostonterriers.com/fleamedchart.htm

Make your own treats. This can be a super fun and creative hobby as well and a bonding experience with your pet. Here is a nice compilation of biscuit recipes for your dog: http://www.thekitchn.com/cookies-for-canines-homemade-d-135078

Spay and neuter your pets to help limit the pet population and to prevent you from supporting additional unplanned pets.

Netflix

It's tempting to subscribe to a cable package when you have kids. There just isn't enough entertainment for kids (maybe they should go OUTSIDE!). Get a Netflix subscription. I understand that now they have more of a family package understanding which allows more people to share together to pay the $8 per month between friends, family, roommates, and neighbors. Netflix is a cheap alternative to constant movie rentals, theater trips, or cable packages.

Consider free internet options.

The internet can be really expensive. Most of us think only briefly on paying for it at home and on our cellular devices. Consider if you are a brief enough user or if you COULD be to only use Wi-Fi in public places like McDonalds, Starbucks, or the public library. Depending on the contract wording, it may also be legal for you to split the cost of your internet and Wi-Fi with a next door neighbor as you would a roommate.

Cancel your home phone if everyone has a cell phone.

Does ANYONE use your home phone (other than telemarketers)? Why pay for it? If you are paying for anything you aren't using - cancel them now. Most families sign up in the same cellular carriers to have a family plan between them which limits the cost of calls to each other. When you've already invested in something like that, why pay for an additional service you don't need any more, just because everyone has a home phone, right?

Skype instead of paying long distance.

Skype sure is a great tool for calling friends and family. It's great to see each other's faces and super nice to know it's at no cost. Being military, we get International Google Voice for free as well.

Comparison shop for your regular subscriptions and contracts occasionally

Consider everything on your spending log and highlight anything you pay for monthly to annually. Whether it's cable, cell, internet, car insurance, life insurance, health insurance, banking, or electricity, take a few minutes each day to evaluate your subscriptions to see if there is a better deal to be made. This could mean signing up for the package that's available right now that suits your needs better or switching to another company for a lower rate.

Buy a steam mop or steam vac.

These tools can keep your floors fabulously clean without having to rent them or buy the chemicals that regular carpet cleaners would bring with them. Just steam!

Line dry or rack dry when possible.

 By using a clothes line or a drying rack you benefit your family in multiple ways. Your dryer is expensive to run. The sunshine can be a natural bleach which allows you to avoid nasty bleaches. Plus no heat of the dryer during the warmer months of the year causing temperature variations and additional needs for cooling.

Avoid using permanent press.

Avoid using permanent press. This setting uses one full extra cycle and the water involved. Save your water bill.

Don't wash clothes using hot.

 Hot water is generally not necessary and costs more per load. Try it out and see if your clothes are equally clean when regularly washed in warm.

Reuse your bath towel.

You take a bath to get all clean and then you dry off with a clean towel. For many this is pretty much a clean towel. Avoid washing every bath towel every day. Find a way to hang towels loosely in order to facilitate proper drying each time. 

Buy Energy Star.

 Consider your appliance purchases carefully before leaving the store. Energy Star compliant appliances can really save your budget and the environment. 

Run full loads of dishes and clothing.

Learn your appliances and see what their capacity is. If it will wash more - wash more! By running full loads of dishes, you balance the equation better comparing the expense of washing by hand and using the dishwasher.

Use your dishwasher.

Your dishwasher uses power but it is a better decision than disposable dishes by far. Furthermore a dishwasher uses less water generally loading and unloading take less time too.

Turn off water not being used to brush teeth.

By filling a cup with water, wetting your toothbrush in the cup, brushing as usual, and using no additional water other than the cup, your household can save water and money every day.

Take short showers.

 Baths use a lot of water. Long showers are not any better. Keep your showers to less than 10 minutes if possible. Consider showering every other day and taking a sponge bath (wet towel shower) on the alternate days.

Low flow shower heads.

These can often use aeration and design to be just as satisfying of a shower using less water in the process.

Clean your shower head.

 Remove your shower head and place it in a bag of white vinegar. It can help to place a rubber band around the neck of a shower head handle then secure it around the bag to keep the vinegar in place for at least an hour. After the hour, replace the shower head and turn on full blast to push out loosened debris. This all helps you get what you're asking for when you adjust your shower.

Check for tank leaks.

To check for water leaking from your tank into your bowl while not being used, place several drops of food coloring into your toilet tank. If you see the color coming into the bowl, you have a leak that should be repaired.