Different people, different strategies. Myra Hindus and Jewell Jackson Myra Hindus of Boston, semi-retired at 68, had her financial adviser estimate the 401(k) withdrawals necessary to support her $4,500 monthly budget, which the adviser also prescribed. But Hindus isn’t fully at ease about her finances, despite the professional advice, a paid-off mortgage, and a good bit more savings than most people have. “It’s a bunch of guesswork,” said the former diversity administrator and consultant to major universities who hedges her bets by teaching college social work courses. What overwhelms her are the many unknowns that will determine whether her money lasts as long as she does. What if her adviser is wrong? Or what if she lives well into her…