Do you have Safety Stewards (Safety Marshals) in your workplace? Make the use of them effectively. First you give inputs to them and tell them to explain in the tool box talk meetings daily.
First you concentrate on your HSE policy of your company and its Objectives and Targets.
Take tool box talk meetings and explain the workers about the above.
Implement safety award/reward functions every month and distribute prizes to those workers who working safely.
I will add few more points in future i am running short of time now.