How do you secure an outward opening door?

Besides the obvious answers of steel door locks, no glass, for me, hands down is an alarm system. For years I slept with one eye open and only when I had a real scare thinking I had a fire in my basement 2 levels down, did I have an alarm system installed. Not only do I feel immediately secure when I come home, but I can sleep knowing that is anyone tried to come in or if a fire broke out, the alarm company would call the police and fire department immediately...no matter what!