How do you pass time on long flights?

Start a sing along and see if the whole plane joins in, usually

[deleted]

Keep telling knock knock jokes.

Um there's a thing called sleep

adjust to the timezone of wherever Im going to through sleep

take advantage of the in-flight entertainment system. Watch a ton of movies or new tv shows you haven't seen. Listen to their music options (can be surprisingly good!). Since you have a power source, do you have a laptop? Or tablet? Or e-reader? No worries on power since you've got these. Traveling to a drastically different time zone? Use this time to start adjusting. Enjoy your alone time.

Listen to a playlist of my favorite songs, sleep. Maybe watch a movie or two.

CheebaChews

Close your eyes. Keep your back straight. Focus on your breathing, in and out of your nostrils, without consciously controlling it. Try not to think about anything in particular - just feel your breaths. Then start focusing your attention on sensations throughout your whole body. Crazy what you'll discover about yourself.

Next thing you know you're either asleep or going down a rabbit hole of thoughts. Both are fine. :)

Usually just music and podcasts, though recently I've been using my Kindle.

Read, TV/movies, or play video games.