I am far from an expert on the subject but IMO the policy of being the most difficult house in the neighbourhood to break into is a good one.
Make your house appear like a bad target compared to the others.
Personally I would like to get a gun. Admittedly the gun is a bigger risk to me than a burglary but I would be interested in taking up the hobby and the added sense of security would be nice. I am not sure how you do so in Ireland however.