Key Points Medicare's open enrollment period is now underway. If you're on Medicare Advantage, it pays to explore your plan choices between now and Dec. 7. Consider a new Medicare Advantage plan if your coverage is changing for the worse, or if your healthcare needs have recently changed. The $23,760 Social Security bonus most retirees completely overlook › There are certain costs you have to plan for as a retiree. And healthcare is a big one to factor into your retirement budget. Since it could ...