There's an article doing the rounds that suggests the things that robbers look for when looking at houses to rob. It has things like rundown front doors with single locks, overflowing mailboxes, dark and overgrown areas and visible interiors. All pretty obvious things that would make a house enticing for a robber.
I'm more interested to hear of things you can do to actively help stop burglars. I'm not sure investing in an alarm system is worth the expense and hassle, but I'm open to feedback from others. What other things do you do or have you installed as a deterrent to burglars?