What are some things that people can do to create better environments for sleeping?

Test Yourself:  On page  of the textbook is a “self test” on sleep deprivation, part 1 & 2.  Complete both parts. Were you able to trace the black star using your non-dominant hand?  In part 2 – what was your score?  Are you sleep deprived, or in the average range?  

What are some things that people can do to create better environments for sleeping?