Make sure room temperature is adequate.
Dark, cool, and quiet is ideal, and ideal room temperature is between 70-71 degrees.
Keep your sleeping quarters mess-free.
If you’re stressed about sleep or anything else before you go to bed, walking into a cluttered room is not going to help. You want your bedroom to be a tranquil place for you to relax.
Block out external noise.
Incorporate a fan to circulate air and block out environmental noises. If you have a noisy bed partner, consider going to bed shortly before they do to let you fall asleep before their snoring interferes with your sleep. Introducing a white noise machine or sound spa to your bedroom can be relaxing and also help drown out any external sounds like a busy street, loud birds, or noisy neighbors and they aren't expensive.
Maintain a consistent bedtime.
A consistent bedtime -- as well as your morning wakeup time -- will help to regulate your body’s rhythm. “If your bedtime varies considerably from one day to the next, it makes it more difficult to settle.”