I think homeowners should keep a mental list of items that could be used as weapons if someone breaks in. Baseball bats, hammers, and guns are too easy. Try keeping something that you have to break or change to make into a weapon. For instance, a ceramic key bowl would have to be broken to make a usable weapon. A laptop could be hurled, as could many heavy objects.
Avoid using other humans as weapons or shields. Complex moral dilemmas are sure to ensue.
Care should be taken to not damage anything for weaponizing that you’d want to use or enjoy after the burglary. (See the human argument above.)
Oh, yeah. Textbooks are good, too. Thick ones with sharp corners.