Keeping the temperature a bit cooler will help promote sleep. Make sure your mattress and your pillow are comfortable. Remove any sounds or ambient lights that may be interrupting you (power buttons, phone display, etc). Putting a piece of dark tape over a power button light can have a big impact. Consider putting your cell phone on “do not disturb” mode for the hours when you are typically sleeping so the notification light will not bother you. Keep electronics out of your bedroom. If you must watch tv or check your phone before bedtime, do it in another room. Save your bedroom for sleep.