I mean common sense.... being carefull. Enter/leave the house quickly, don't talk on the street, know who comes to your house. Look around, be aware, those sort of things that I think are not as important when you live in an apartment. Also, if you like to travel or leave for the day, leaving a house is more work than just locking the main door of your apartment.... that's all.... I didn't mean to scare or anything. You just have to be a little bit more "aware".
Upon our arival back in town, I asked a lot around as most of my friends and family live in the area. The vast majority never had a problem, but those who did (like getting the house robbed while not at home) those were always related to people. Either a maid who set them up, or the security guard (most blocks have private security in each corner) "sold the house", and that kind of thing.