Problem scenario
You live in a northern latitude and it stays light until late at night and gets light out early in the morning. How do you sleep under these conditions?
Solution
Background information: Sleep is important. Research says you should try to get more than eight hours of sleep.
Buy a high quality sleep mask (as opposed to a very affordable one). There is a difference in the usefulness and comfort; if you have only used inexpensive ones, you may want to try a new one.
If you travel regularly, you may want to buy a travel pillow or an inflatable pillow.
If you want tips on how to deal with noise, see this article.