1.) Use the library. You really don't need to own every book on your shelf do you? The library saves money and space. Also use the library for DVD rental,an indoor play space for the kids, classes, story time, ect.
We got rid of almost all of our book, including kid's books and use the library instead. It makes a fun weekly trip with the kids and they always have something new to read.
2.) Work-out outside. This one depends on where you live and the weather, but if you are paying for a gym membership or filling your home with gym equipment, consider active outdoor activities to get your heart pumping. Go for a run, do some yoga in the open air, push-ups, sit-ups. Many work-out can be done with minimal equipment and no gym membership. Use a local park, which may even offer bike rental, group yoga, tennis, or more.
We got rid of our gym membership and now we run and do yoga.
Here are some tips for hiking with kids.
4.) Use mall playgrounds in bad weather. Most malls have some kind of kid play around or playground. Pack some snacks and head to these free indoor playgrounds in bad weather. In my area there are also a couple of stores within the mall that have kid play areas, some are free while others have a small fee, but well worth it for a rainy or snowy day.
We choose to own only a few toys and take advantage of community play spaces. It's fun for the kids and keeps our home more peaceful without the extra toy clutter.
5.) Check out community co-ops. There are often community gardens, homeschool co-ops, and groups and clubs for all sorts of things. A lot of them are free. Also try using a classifieds like Freecycle if you need an item before purchasing. If you live in a larger city, try out bike share or car share programs or use public transit instead of owing a vehicle of your own.
Our family is also not afraid to ask to borrow from a friend. We are always willing to lend our stuff as well. Why keep lots of camping gear if you only camp once in a while. We have lent out our tent many times. Try toy swapping with other parents instead of buying every toy new. I have even swapped clothes with friends just for something new. A little creative thinking goes a long way.