This may seem like common sense after Flint, but at this point I think a home water filter is needed for most parts of the country. Can't blindly trust the municipalities.
A Home Air filter is probably needed too.
Here's a growing list of things Youtube told me things one should invest:
1. Home Water Purifier
2. Air Filter
3. Good Mattress / Pillow
4. Blackout Blinds for Windows (sleep)
5. Gym Membership
6. Standing Desk
7. Travel
8. Vegan/Plant Based Diet
Oh and Washing Hands regularly.
Yeah its a growing list, and getting kind of expensive. I'm surprised how much it starts resembling living in a 4 star hotel.