Hire a house sitter to live in your house. This is the most effective option, because your house really will be lived in while you are away. You can hire a friend or relative. You can also hire someone you do not know, but that might be dangerous.
Set up your lights to turn on and off at regular intervals with a timer. This will make it appear that you are home, whether you are or not. Add a radio or television to the timer as well, for added effect.
Ask a neighbor to pick up your mail and newspapers. This will keep them from piling up and alerting someone that you are not home.
Leave a car in your driveway. If you cannot leave your car, ask a neighbor to park his car there on occasion to keep up the illusion that you are home.