That’s one every 15 seconds, according to the FBI, proving just how easy it is for burglars to gain entry. But before you make a big purchase on a security system, take a good hard look around your home. A few simple, low- or no-cost measures will significantly deter a would-be thief from targeting your home.

"The goal in home security is to make it so that the casual burglar will be deterred," Chris McGoey, an independent security consultant in the Los Angeles area, said. "It’s impossible to make your house perfectly secure, but there are low-tech measures that will do 90 percent of the job."

Choose a coming weekend and go over these 14 steps—which range from low-effort, no-cost chores to more-involved, pricier projects—to improve your home’s security.

1. Hold a household meeting

Make home security a habit, with every member of the household—including kids—agreeing to a routine that should include such simple rules as:

Use door and window locks. It costs nothing and takes little energy. Make it a habit to lock every door and window when leaving, after entering, and before bedtime.

Do not open the door to uninvited or unwelcome visitors.

Close and lock the garage door.

Secure your home even if you’re doing work around the house and yard.

Use your alarm system all the time, even when you take a quick trip to the store or visit next-door neighbors.

2. Call on the police

Many municipal police departments offer complimentary home inspections. An officer walks through your home and recommends simple, cost-effective changes to tighten security.

3. Organize a burglary

This is a fun, useful exercise to do with a trusted neighbor or friend: Allow your neighbor to roam through your house for three minutes, find as many small valuables as possible, and remove them from your house. Let the ersatz burglar demonstrate how easy it is to find valuables. Then hide them from real burglars. That might mean buying a small safe that bolts to the floor, renting an off-premises safe-deposit box, or stashing jewelry and cash in unorthodox places. You can return the favor for your neighbor.

Be smart with your keys.

4. Remove the ‘hidden’ house key

The key under the mat, inside the mailbox, beneath a rock—everybody hides a house key. Problem is, burglars know your hiding places. Instead, give it to a trusted neighbor.

5. Place keys and garage-door remotes in a smart spot

Don’t leave car and house keys and remotes near the door or otherwise visible inside your house. Secure them inside a cabinet or a drawer to keep them hidden.

6. Add foreboding signs

Post security-company signs or window stickers near all entryways—whether you have a security system or not. Maybe you have signs/stickers on hand from a previous contract with a security firm, or maybe you can get some from a friend. In addition, post a few "Beware of Dog" signs in visible spots, say at the front of the house or on a gate to the backyard.

7. Lock up the ladder

Don’t store a ladder outside. A burglar, perhaps posing as a handyman or contractor, could use it to gain access to a second-floor window or balcony.