Proceed carefully with your career
Safety training is an important aspect of your work. But what happens if you've forgotten to train the new forklift operator and he damages a significant amount of inventory? Suppose you've written a company safety manual, but failed to include diagrams and information on finding proper fire escape routes?
Issues like these go unnoticed until it's too late. General liability is important, but it only goes so far. An errors and omissions insurance policy allows you to continue working even when your standards and ethics are called into question.
One careless oversight can destroy your reputation and wipe out all your savings in the process. Keep your business as safe as you keep your clients.