Which of the following is NOT an important feature of sleep hygiene?

Drinking caffeine before bed is indeed not an important feature of sleep hygiene, as it can negatively impact sleep quality. Caffeine is a stimulant that can interfere with the ability to fall asleep and can disrupt the sleep cycle. For individuals seeking to improve their sleep hygiene, it is generally recommended to avoid consuming caffeine in the hours leading up to bedtime to help promote better sleep.

In contrast, the other options—consistency in sleep schedule, maintaining a quiet and dark environment, and ensuring comfortable sleeping conditions—are all crucial factors in promoting healthy sleep habits. A consistent sleep schedule helps regulate the body's internal clock, while a quiet and dark environment can reduce disruptions and facilitate deeper sleep. Comfortable sleeping conditions, such as the right mattress and bedding, contribute to overall sleep quality, making them vital components of effective sleep hygiene practices.