I don't know how to stop suffering. I'm not sure it's ultimately possible.
I don't think Christianity offers an end to suffering, for example. I already posted a notable passage that says basically: if you're gonna suffer, make sure you're suffering for the right reasons and not your own shitty behavior. And that's it!
All I know how to do is:
1. Try to not cause any more suffering.
2. Encourage people who are suffering.
I know people have encouraged me when I was really suffering, and eventually it seemed to help. And I don't mean online, either! I mean they showed up at my house and made me get out of bed and sat with me while I suffered until I wasn't suffering any more.
I think it's a one-by-one thing that doesn't scale up with mass communication. Which puts relief at a disadvantage, of course, since it's pretty easy to cause suffering on a widespread basis.
But hey, one by one, slowly we do what we can.