I'm glad that your H says he is trying. And, yes, we all need that HUGE stop sign to remind us to stop over-analyzing everything....and to stop fretting about every little thing.
This past week, my mantra, when I start to obsess and worry is this:
"Can I change this? Is it actually something that I can do anything about?"
If not....then, I tell myself over and over "Then, let it go..."
In my last real conversation with my grandmother, she mentioned that the one regret she had in her life was that she wished she had worried less. She was known in our family for being a worrier....and in the end, she realized how much time and energy she'd wasted just worrying....often about things that never even came to pass.
I tend to be that way, too. But, I'm learning to work on just enjoying the positive...and letting go of the rest.