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Handle things once (saves 15 to 20 minutes). When it comes to e-mail, voice mail, or paperwork, take instant action—i.e., read, answer, delete, file—so you don't have to come back to it. The accumulated time saved can add up to ten hours a month, says Jana Kemp, a Boise, Idaho, "time architect" and the author of No! How One Simple Word Can Transform Your Life.