I posted on another thread about the door armor. Buy it and install it on your doors. Easy to do and effective. Make sure you have motion lights that blind the neighbors. They are pricey, but good deterrents to would be idiots.
The simplisafe system seems to be the best for the money. I would also look into the Burglar Bombs http://burglarbomb.com/
just make sure to reach in and disarm before you open your door or you are going to pepper spray the hell out of yourself. If you aren't home, these would pretty much make sure anyone who makes entrance into your house is going to leave, quickly. If you have kids, no worries. They can be installed pointing down so they cant be reach by little hands.
Outside of that, it is a crap shoot. I would prefer someone breaks in while we are gone then when I am home. If I am home I am going to have to clean up one hell of a mess, I cant imagine that stuff comes out of the walls or carpet all that well (meaning blood, bone, and all the gooey stuff in between).
If you have stuff you don't want stolen, secure it in a safe that is extremely heavy and bolted into the foundation.