Sooner or later, adult children need to talk to their aging parents about their medical, financial and legal affairs. You are probably saying to yourself, "How about later?"  While it may not be the easiest conversation, the inescapable truth is that the responsibility for parents' care, ensuring that their wishes are carried out, and the disposition of personal affairs will ultimately be yours. Before you choose to wait just a little longer, here are seven tips for successfully approaching these sensitive private matters.