11. Dog walk and pet sit. Owners are always looking for reliable pet-care services. Plus, if you stay home with your kids during the day, a regular dog-walking gig is a great way to get everyone out of the house for some fresh air and earn extra money. Put the word out at pounds, the ASPCA, the local veterinarian's and dog runs. Be prepared to provide references from anyone you've ever sat for before. Learn how you can also turn pet sitting into a home business.

12. Babysit. To provide regular child care in your home, you'll often need to be accredited and registered with the state. But occasional babysitting in your home or someone else's is more straightforward. You might already babysit for friends for free, but by reaching out in your community you can find parents whom you would feel comfortable charging a reasonable fee -- such as those belonging to common churches, PTAs or playgroups. Depending on your schedule, you can position yourself as a last-minute resource, a Saturday sitter while Mom does errands, a date-night sitter and so on.

13. Rent out a room. This option might take longer than some of the others listed here, but it can provide steady income for a set period of time, or even indefinitely. It might require that your kids share a bedroom or that you give up a family room in the house, so everyone in the family should be prepared for the changes. And of course care should be taken to pick carefully to ensure you get a trustworthy boarder. This is an especially good option if you live near a university or technical college. Eighteen- to 22-year-olds will more likely be fine renting a room with kitchen privileges than older people, and you'll be able to rent on a semester basis.

Watch Video: Staying on a Budget