If you've done any of your own investigation in this area then you'll know that there is a huge amount of material out there, loads of it completely free.
Liking or disliking them, finding things that are effective or counterproductive is completely subjective. I'm going to post things I find or have found useful. If they send you screaming up the walls, I apologise.
This one works for me because I find the narrators voice soothing. I like the explanation.
I'm making YouTube playlists of videos I find useful, you can find them on my personal YouTube channel or the More Than Sober page. Perhaps one day I'll make my own videos - now that's a reason for anxiety!
Let me know what you think with a comment or by screaming at the moon, I'll probably get the message.