Try going without sleep for more than a couple of days and you'll quickly find out just how important it is.
Sleep is when your brain and body recover. It's a time of rejuvenation. A time of healing. Getting too little sleep or not sleeping good may be one of the most detrimental things to your overall health.
I try to go to sleep around the same time every night and wake up without an alarm as much as possible. At night, in order to mitigate artificial lights that keep your brain thinking it's daytime, I wear the glassses at the bottom of this page.
The glasses are also known as blue-blockers and keep white and blue light from entering your brain. After dinner, my family and I also turn off all artificial lights and use candle-light and amber tea lights to light our way during bath, snack and bedtime. I also wear a mindfold sleep mask from mindfold.com
The bottom line is -- try to go to bed at the same time every night, get a few hours BEFORE midnight, mitigate artificial light exposure at night, and get at least 7 hours a night as much as possible. I track my sleep patterns every day on the Simply Human -- Daily page.