1) A bedroom is for two things only.......sleep and sex, that's it. Your bedroom is not a place for work or exercise or watching horror movies. It should be your sanctuary, a place of rest and relaxation, free of any unnecessary stress or stimulation. If you're serious about improving your sleep quality you'll need need to realise that your bedroom IS NOT an office, a home cinema, a games room or a gym.
It may be tough, but the first thing you need to do is get rid of every gadget and gizmo that's not immediately related to sleeping. A few books are OK to unwind, but TVs and computers are particularly bad bedroom companions. The blue light emitted from computer screens can seriously disrupt your sleep patterns by blocking the sleep hormone, melatonin. Falling asleep with the TV on, as well as causing you uneccessary stimulation at night could even cause depression.