• Make sure all entryways are properly lit.
  Not only is good lighting safer, it's also more secure.
• Check all smoke and carbon monoxide detectors.
  Test to make sure they are operative. If battery-operated, replace batteries with fresh ones.

Security

• Check all windows to make sure they lock properly.
  Consider installing covers on window wells to discourage basement intruders.
• Consider a home security system.
  What you choose to install is a matter of preference but also could depend on the crime rate in your neighborhood. Some systems are connected to local police; others are connected to the security company itself, which immediately investigates any alarms.
• Look at your landscaping.
  Thorny bushes and climbing vines act as natural barbed wire near fences and windows. Trim shrubs to avoid obscuring windows.
• Install lighting that illuminates the edges of your property.
  This could take the form of a couple of well-placed spotlights.