In a liquidity trap, central banks can use interest rate rules to guide monetary policy. By promising to keep interest rates at zero for a specific time based on the economy's condition, they can prevent deflationary spirals. Even though the zero lower bound limits traditional strategies, adjusting the duration of the zero interest rate peg can maintain stability. Fiscal policy doesn't impact this approach. These rules are easy to explain, require minimal changes, and don't cause unnecessary welfare losses.