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To view and hear this story, RealPlayer is required. Download RealPlayer 8 Basic for free, or see our audio help page . Inadequate sleep is associated with a broad range of serious problems, including depression, complication of heart disease and increased risk of accidents. It's not just the late hours of New Year's Eve, but a host of factors throughout this holiday that send people into the new year tired and at risk. The combination of late hours, consumption of alcohol and rich foods before bedtime, exposure to artificial light deep into the night, and sleeping in an unfamiliar environment, such as a hotel or friend's guest room, can have a dramatic impact on sleep patterns that may persist for weeks after the holiday.