Keep your garage door down and locked. This helps protect property stored inside. While you are away, electric doors should be disconnected and padlocked. Look into an alarm system. There are hundreds of different systems on the market.
Costs are commensurate with the sophistication of the system.
Ask a neighbor to use your garbage cans. Empty cans can be a tip off that you are away. Ask someone to park in your driveway. This gives the illusion that someone is home. Consult a reputable locksmith.