I've created 3 different email addresses. One is for volunteerism and work; another is for bills, and the third is for promotions, i.e., subscriptions to stores.
This helps me a lot because I was overwhelmed with keeping up with important emails while deleting ones that aren't important. I made several mistakes deleting important emails. Now, that my emails are organized I don't have that problem.
What is a small thing you've done to improve your mental health.