Key PointsA common rule is to have socked away seven times your salary by age 55.But that might be too little or too much.The $23,760 Social Security bonus most retirees completely overlook › As we plan, save, and invest for our retirements, it's important to not get too far behind where we should be. One rule of thumb offered by the folks at Fidelity is that by age 55, you should have socked away seven times your annual salary. The table below …