Leave exterior lights on when you go to bed, well lit areas are a deterrent to would be thieves.
Keep your car and house locked. Do not leave valuables inside your car, this includes garage door openers.
Trim bushes and tree 's don't give thieves an easy place to hide or sneak up on your property
Close your garage even when you are home. Park your cars in the garage. Thieves will walk past and see something they want and it will be gone.
Security Camera 's are more of deterrent, however data has shown it can deter people from entering your property
It is shocking how many people don't know there neighbours, make an effort to get to know who lives near you. So many amazing people and future friendships are out there.
Door locks, make sure all exterior doors on your home have a dead bolt style lock.
Consider a home security system. Not only can they detect motion in your home when you are away but they act an auditory deterrent if someone was to enter your home.