One way to do it is by implementing a safety program which includes a lighter work flow for injured employees coming back to work after injury.
One important way to reduce your work comp premium is to have a special audit perfomed by a third-party independent company that specializes in work comp audits for your type of trade/business. In addition, these auditors can review and analyze the data/policies for possible mistakes done by your insurance carriers resulting in correction of X-mods/rating factors which may lower your overall comp rates!
You can find companies that work on a contingency fee basis which means no money up front from you. No fee if no recovery! just like a personal injury in an accident scenario!