I strongly agree that our bedroom plays a big role in our sleep. Not only the habit or things that we do during the day can affect it, but also our surroundings. Make sure that our bedroom is sleep-friendly, avoid any distraction such as tv or computer, it is best to make it more solemn and relaxing. i found more sleep tips from this site, i would like to share it to you - http://articles.mercola.com/sites/articles/archive/2010/10/02/secrets-to-a-good-night-sleep.aspx