or if you dont have time and want to help download the climate action now application turn on notifications for it and it will remind you to take a 5 minute action every few days.
Yoga Nidra you can find Mona Annand on youtube and on MP3 at Amazon. I reccomend downloading the MP3 on your phone or tablet and playing it as you lay down for bed. After a while you will not need the mp3 as you can simply breath and relax. One trick is to use your breath to relax on breathing out. The other is to breath shallowly as you would when you sleep.
Rimon has a good explanation on how Magnesium is helpful for reducing stress and Magnesium Glutenate is helpful to sleep.