Awww... cute puppies...
1) Steel door, even if it looks a little ghetto, with hinges that have LONG screws into solid material, and a long deadbolt into a similar receptacle (or three...).
2) Lose the tacky cute widdle windows next to the door. I know the guy who is trying to sell you on the house thinks they're the best thing since American Idol, but damn, they're easy to PUNCH through, and besides, they're just tacky. Was at a friend's place - faux stained glass and all... Yeech.
3) A cheapo security camera is a good thing. A window down the porch where you can slide out a telephone for the "poor guy with car problems" is also a good thing. If they won't make the call, reach for the rock salt.