After Christmas, many people put the empty boxes their expensive gifts came in out on the curb. What do you think that says to potential burglars? It screams, “I just got a brand-new TV! Come and rob me!”

That’s just one example of some unwise habits homeowners have. If those owners are sellers opening their doors to the public for showings, habits such as these put them in even greater danger.

1. Maintain your property. Especially in the wintertime, many people stay indoors and neglect issues such as peeling trim or an overgrown yard. But if the home looks unkempt, thieves may think it’s abandoned and, therefore, an easy target. Shoveling your walkways to clear them of snow and debris and removing holiday decorations and fallen tree branches in a timely manner will signal that the home is occupied.
2. Know your neighbors. Many people don’t really know their neighbors; it’s more than just saying hi and being friendly. Invite them over to see your home before it goes on the market, and introduce them to the people they may see regularly stopping by during this time (especially your agent). Then they’ll know who is and isn’t supposed to be at your home and can better assess when there may be a threat while you’re gone.
3. Assess your home’s vulnerability. Walk to the curb and face your house. Ask yourself, “How would I get in if I were locked out?” The first thing you think of, whether it’s the window with a broken lock or the door that won’t shut all the way, is exactly how a thief will get in. Think like a burglar, and then address the issues that come to mind.
4. Respect the power of lighting. Criminals are cowards, and they don’t want to be seen. The house that is well-lit at night provides a deterrent because thieves don’t want the attention and the potential to be caught by witnesses. It’s wise to invest in tools that make nighttime light automation easy. That includes dusk-to-dawn adapters that go into existing light fixtures and motion detectors. But beware of leaving your exterior lights on at all times, which signifies the occupant is gone for an extended period of time.
5. Use technology to make your home look occupied. In addition to lighting, smart-home technology has made it easier to make it appear like people are home, even when they’re not. Systems that remotely control lighting, music, and appliances such as a thermostat can help you achieve this. Though not considered smart-home tech, simple lamp timing devices available at hardware stores are also good for this purpose.
6. Yes, it has to be said: Lock your doors. It’s amazing how many people think they live in a safe-enough neighborhood not to have to lock their doors when they leave. Some facts sellers should know: In 30 percent of burglaries, the criminals access the home through an unlocked door or window; 34 percent of burglars use the front door to get inside; and 22 percent use the back door, according to the FBI Uniform Crime Report.
7. Reinforce your locks. A good door lock is nothing without a solid frame. Invest in a solid door jam and strike plate first, and then invest in good locks. Know the difference between a single-cylinder and a double-cylinder deadbolt. Double-cylinder deadbolts are recommended because they require a key to get in and out. For safety and emergency escape purposes, you must leave the key in when you are home. But double-cylinder locks are against regulations in some places, so check with your local police department’s crime prevention office.
8. Blare the sirens. Burglars are usually in and out in less than five minutes, and they know police can’t respond to an alarm that quickly. Their bigger concern is witnesses to their crime. For that reason, an external siren is invaluable, whether as part of a monitored security system or a DIY alarm. Even if you don’t have an alarm, it’s not a bad idea to invest in fake security signs and post them near doors.
9. Consider surveillance cameras. The Los Angeles Police Department started a program encouraging homeowners to install a device called Ring, a doorbell with video surveillance capability that allows homeowners to view what’s outside their door on their smartphone, in a neighborhood that was a target for burglaries. After Ring was installed in hundreds of homes, the burglary rate dropped by 55 percent, according to reports. Most state and local regulations require posting a warning that people are being recorded. (But again, this can be effective even if you don’t actually have the cameras installed!)
10. Mark your valuables and record details. Use invisible-ink pens or engravers to mark identifying information (driver’s license or state ID numbers) on items. Log serial numbers and take photos of your belongings. Check to see if your police department participates in the Operation Identification program. They will have stickers for you to place on doors or windows warning would-be thieves that your items are marked. These steps may prevent them from pawning or selling stolen items and can help you reclaim recovered belongings.