Good neighbors are a big hurdle for burglars: The less neighbors keep to themselves, the greater their willingness to keep an eye on one another's property. A sealed-off and overgrown patio not only offers protection from inquisitive glances but is also the ideal camouflage for burglars.
Along with conscious actions to make life hard for burglars, there are of course some structural and electronic measures that will keep out the thieves: Doors with multipoint locking systems, burglar-proof shutters, additional locks, window and light well grilles, sensor lights and alarm systems. Even so, you need a lot of expertise for these items, so it's best to get the advice of an expert.