Unlike the elaborate tunneling operations of bank heist movies, most home burglars in real life simply go in the front door. Breaking or removing the front door is the most common form of forced-entry burglary, according to the U.S. Department of Justice. You can ward off many thieves by simply locking the door, as at least 30 percent of burglaries don’t involve a forced entry. To keep away more aggressive burglars, take these steps to reinforce your door, locks and doorframe.