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Re:Ask HN: how did you fix problems with bad sleep? by prakash on Saturday May 31, 2008 @05:06AM (#205186)
www.supermemo.com/articles/sleep.htm -- read this.
Re:Ask HN: how did you fix problems with bad sleep? by eru on Saturday May 31, 2008 @01:17PM (#205317)
That boring? ;)

Edit: Actually the linked article seems quite interesting.