Go to bed at the same time every night. This helps regulate your circadian rhythm - your bodies internal clock - to when it should be asleep and awake.
Lower the thermostat. Most houses have programmable thermostats. Set yours to lower to 62 to 65 degrees as you sleep.
Ditch the lights. Any light from alarm clocks, cell phones (even that little notification blink), TVs, or tablets emits blue light, which affects the release of melatonin. Melatonin is a hormone which helps your body to sleep.
Skip the booze at dinner. Alcohol will help you to fall asleep faster, but do not be fooled. It is robbing you of REM sleep - the deep sleep that repairs and restores the body!
Exercise daily! Getting your body moving - and establishing a long term exercise routine - is one of the best promoters of getting quality sleep!