Install a deadbolt on all exterior doors (with the permission of management) and place a wooden rod in the track of any sliding glass doors to add extra protection to entry points. 
 

Always lock the doors and windows when you leave or go to sleep. If you have a security alarm, remember to set it. The best security companies will alert the police if the alarm is triggered. 
 

Buy a few timers so you can set your lights and a radio to turn on and off periodically throughout the day to trick thieves into thinking someone’s home. 
 

If you live close to work, pop by your apartment over lunch on random days to check on things. (Bonus: your pet will love the additional company) 
 

Before leaving town, ask your complex’s courtesy officer to check on your unit while you’re away. 
 

If you’re getting ready to move, consider a unit on a higher level. Thieves often target first-story units because it’s more difficult to carry items downstairs without being seen.