From your 20s to your 60s, the priorities change—but the basic job doesn’t. Don and Tom walk through emergency savings, Roth IRAs, 401(k) matches, rebalancing, retirement planning, Social Security, Medicare, and estate planning, decade by decade. Then Mary calls with a smart Roth-conversion puzzle. They weigh whose IRA to convert, how much to move without wasting a low tax bracket, the age-59½ penalty, and why a household’s accounts should be managed as one portfolio—even when the spouses ha...