keep areas well lit: building entrances should be bright at all times +provide clear line of sight from both inside, outside;
eliminate hiding spots: cut down hedges, remove trees, bushes, fences, dumpsters, etc. that create blind spots/ hiding places;
low, thorny hedges work well around windows, don't obstruct view in/ out, they don't provide comfortable place to hide;
CCTV to view areas without natural sight lines, put up monitors in public areas so visitors know they are watched;
Front doors should always face onto the street, cul-de-sacs, residents overlook each others homes;