The "shred" method, also known as the "HELOC strategy" or "mortgage acceleration" method, is a strategy where you use a Home Equity Line of Credit (HELOC) to pay off your mortgage faster. The basic idea is to use a HELOC to make large lump sum payments towards your mortgage, then use all of your income to pay down the HELOC balance as quickly as possible. This method can save you thousands of dollars in interest and help you pay off your mortgage years earlier, but it requires careful planning and financial discipline.