One of the best ways to improve collection strategies is to head off problems before they start. A comprehensive credit policy will help you avoid riskier clients and reward those that pay on time. You should always check business credit on B2B clients before you extend payment terms. Consider reporting payments to business credit and let your clients know upfront that you will report if they pay on-time (which helps build their business credit) or if they pay late (which can hurt their business credit). If you’ve done all of that, then contacting clients as soon as they become delinquent is important. If you don’t reach out they may assume they can put your invoice at the bottom of the pile. You may also want to contract with a collection agency or collection attorney and set a  policy for your clients that explains when the account will go to collections.