17. White noise machine
Have trouble sleeping? Already tried the blackout curtains we mentioned at #13? Maybe you need to try a white noise machine. White noise can block out distracting background sounds, while the noise itself is something your ears can get used to pretty quickly.
You might be able to fall asleep a lot faster when the traffic noises outside or the sounds your neighbors make are a lot less noticeable. Try it out yourself! Some insomniacs report that this was a life changing purchase for them. Sleep tight!
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