How much money do you need to save for retirement? Labor economist Teresa Ghilarducci, author of How to Retire With Enough Money: And How to Know What Enough Is, explains how to make this decision, based both on rules of thumb and your personal situation. Find out how to avoid the most common mistakes that people make when planning for retirement. Doug Goldstein, CFP®, talks about withdrawing from your retirement savings. Learn about the adverse results of not taking "required minimum distributions" on today's show. Follow Teresa Ghilarducci at http://teresaghilarducci.org/ and on Twitter @tghilarducci