“Lights-Proper lighting eliminates shadows, which burglars use for cover. Light up all points of entry, including those on the roof. Leave lights on inside just as you would do at home. Install lighting at the front and back in addition to any side doors of your business.
Doors-As with windows, check for signs of any structural weaknesses. Use heavy and solid constructions, and material that is drill-resistant. You can also reinforce the backs of doors with crossbars. Be sure the doorframes cannot easily be jimmied.
Locks-The burglar-proof lock has not yet been designed, but adequate locks are available and will deter even the most determined. Modern, double cylinder-type, long throw dead-bolt locks are preferable and should replace hasps and padlocks where possible. Proper installation should prevent prying, twisting or cutting. Control of keys is important.
Windows-Check window frames to see if they are loose or rotting, and ensure that the windows offer visibility. Arrange merchandise so that a passerby can see into the store. The store employee needs to be able to notice dangers outside and let witnesses see trouble inside. So keep windows clear of obstructions, from stacked boxes on the floor to high shrubs beside the walkways. Covering windows with bars or grills for added protection may be necessary. Install burglar-resistant glass or use wire mesh or iron bars over all glass.
Alarm System-Install an alarm system. At least an alarm offers a measure of peace of mind. It is a deterrent to burglars, or forces them to get out quickly if they happen to break in. Post warnings in clear view that the business is equipped with an alarm, and train the staff to avoid false alarms.
Video Surveillance-The decision to use security cameras depends largely on the available budget, monitoring capabilities, and the physical environment. For outdoor lots, cameras can give security personnel a feel for what is happening in the general area. Indoors, cameras are particularly effective at elevators, lobbies, entrances and exits, cash/ticket booths, stairwells, or any other area where people stand and wait.”
http://www.houstontx.gov/police/keep_houston_safe/commercial_crime_prevention.htm