The unannounced audio just woke my wife up as I was reading this at 2 am as an insomniac. Don’t do that.
Don't surf from the bed, get up, do something, and get back to the bed when you are ready to sleep. (nope, I am not your wife even if I sound like her :)
Now that I've fixed your problems, how do I get back to sleep after I wake up or get woken up at 3-4am? :)
Medito (https://anagora.org/go/medito) is a good free and open source app for mindfulness meditation, produced by a nonprofit.
(I hope I can do away with the phone for it soon enough, or it may turn out to make things worse :))