Something that my company did and is currently doing to improve GMP is overhauling a remediation that looks over every procedure and important documents used in the management system and going over it with a fine tooth comb. Doing so is a preventative action in knowing that all documents are procedures are accurate, up to date and follow proper procedure. Another action that my company took is making sure each employee rereads the more important training docs and reads the improved documents. Having a refresher can also help to maintain good GMP.