Water. Some of you may be asking, "How can water wake me up?" Well, drinking one glass of water before bedtime will make you have to, well, get up to use the restroom. So, that's one way of course. But there are several other ways. The shower includes water, unless you live with Willy Wonka and have the best chocolate shower ever! However, what's most effective is being awakened by cold water being thrown on you by someone. That is a guarantee that you'll wake up. If we want to make it scientific, water has a lot of health benefits, too. Think about it, your body is made up mostly of water. You can last 3 weeks without any food but only 3 days without water, meaning it is important to the body daily. So, starting the day with a tall glass of water or bottle of water can really help the body. You're going to be asleep an average of 4 to 8 hours if you're a normal American, so by the time you wake up your body is going to need something to drink. Your body needs the water to wake up cells, blood, and so forth. So, why not give your body water instead of something like coffee when in the end, you never see a crash when you keep hydrated with water?