Article: Even a short, brisk walk can help wake you up and give you the energy you need to make it through the day. Experts have found that being immersed in natural light can increase wakefulness and make you feel more alert as you go through your day. If possible, work with the windows open to allow fresh air to enter, and try listening to music to keep you going.
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Get in a light workout. Spend some time in the sun. Change your environment.