Here a few questions to get you started. Trim trees and shrubs near your doors and windows, and think carefully before installing a high, wooden fence around your back year. High fences and shrubbery can add to your privacy, but privacy is a burglar's asset. Consider trading a little extra privacy for a bit of added security. Exterior lights, mounted out of easy reach, can reduce the darkness a burglar finds comforting.
Time is a burglar's enemy, too.
A burglar delayed for four or five minutes is apt to give up and try for another, less difficult location. Try to make the general prospect of robbing your home and noisy job. Noise is that important third enemy of the burglar. Many types of alarm systems are available, with detectors to be mounted on doors and windows. Ask your police department or sheriff to have someone survey your home and advise you about suitable protection.