That there is other intelligent life in the universe. We may never encounter it, certainly not within any of our lifetimes, but it's out there somewhere. The universe is too goddamn big for us to be the only ones.
That the near complete absence of financial literacy education in American public schools is 100% on purpose.
Set the do not disturb feature on your phone to turn on from 10pm-7am.
You will sleep so much better without constant notifications from emails, games, or your mother in law who wants to send a group message at midnight because she is in a different timezone.
If you have people you want to be able to reach you (family/girlfriend/boyfriend), you can make a special list that will let only their calls/messages come through.