One of the most important crime prevention methods is also the cheapest. Leave lights on timers inside and outside when you leave your home. Have motion sensor lights installed on your property, if possible. If you have an alarm, USE IT, even when out of the house for a short time. If you do not have an alarm, think about getting one.
Alarms are still a strong deterrent.
Cellular phone alarms, and direct lines to police headquarters are very effective. Contact your alarm company for further information or call Police Headquarters. Have dead bolts installed on doors, and security bars on sliding glass windows. Ask a neighbor to make sure no packages are delivered. Do not leave a message on your machine , stating you will be away.