Is there anything as annoying as trying to sleep when loud noises won't leave you alone? Probably not. Traffic, the phone, your sleep-mate watching television... the list goes on and on. While most people would agree that a quiet environment is essential to good sleep, few take proactive steps to ensure that their sleep environment is quiet.
Caffeine, the largely unregulated central nervous system stimulant, is great for a quick boost. The world practically runs on it. But it may be disrupting your sleep, and you may not know it. Caffeine’s half life – the length of time it takes for ½ of the drug to be eliminated from your body, is around five hours for a typical person.