Times have changed since the days when Americans left their doors and windows unlocked while away from home. The FBI reported in 2017 that there are an average of 160 burglaries per hour, or 3,840 burglaries per day. You can call the nearest alarm company and hand them your credit card—or you can read on.
In fact, even if you do call the alarm company, remember that when it comes to burglaries, their main purposes are to alert the authorities, sound an alarm that will hopefully scare the burglars away (and not simply signal them to start their stopwatch and grab as much as they can before the police arrive), and record video footage of the event for potential prosecution later.