FAST TV services (free, ad supported streaming), is taking over traditional pay services so there’s that. Hoopla/Kanopy are free with library card as well. OTA antennas (not the junk ones but Winegard, AntennasDirect, Mohu…).
Adding solar powered devices individually in lieu of a full upgrade.
You mentioned grocery outlet and meal planning already. Those two together is a MAJOR saver on the front and back ends. Kudos to you! Better foods also lead to better health and longevity along with lower medical bills. Being at the doctor less tends to lessen your exposure to medical malpractice and less nefarious but similarly detrimental to the patient… errors.
Enjoy nature! It’s free and beautiful!
Do simple tweaks… Hypermile driving style, turn thermostats up or down only a degree or two. Minimal changes to comfort but notable changes to utility bills.
Keep insurance paid up! Keep an honest insurance company too.
Use GasBuddy to find the best prices on gas.
Lock in utility rates ideally with companies with no early termination fee just in case prices drop significantly during the life of the original contract. These companies exist and we customers can use them against each other to effectively and indirectly “keep them honest” all the while keeping our utility rates at the low end of what’s possible.
Use apps like Ibotta and Fetch to get cash back on purchases that ARE made at the “normal” stores.
Enjoy what you already have… games, movies, books, family.
Perform or secure proper maintenance on the expensive items (yard equipment, vehicles, computers, etc).
Get off the treadmill most embrace and craft your own forward path. That’s basically what all these things do for us. And by all these things I mean my list, your list and all other legitimate tips humans have.