Here is a list I have formed:

-Switch to Esim

-Build more apartments

-Use shampoo/conditioner bars

-Put carbon labels on products

-Buy stuff at the store

-Eat plant based

-Prioritize transit over cars

-Switch to Ecosia

-Recycle

-Give homemade gifts

-Compost

-Be organized

-Avoid synthetic cloths

-Switch to green burials

-Buy reputable carbon credits

-Mandate microfibre filters for washing machines

-Install Linux on old computers

-Switch to Electric car -Shut down all oil operations

-Pickup litter

-Ride your bicycle instead of the car

-Adopt kids and companions instead

-Build more green spaces

-Convert animal agriculture land to wild lands

-Support repairability

-Ban private jets