Get the Junk outta your trunk.
It’s one thing to keep a first aid kit or a car jack packed away inside your car’s trunk, but using your trunk as outright storage space comes with a cost to both your wallet and the environment. The heavier your car, the more gas it takes to move it from Point A to Point B, and if your trunk is full, the difference isn’t trivial. Try keeping you trunk empty of everything you aren’t needing to transport every day. If you only need to move somethign once a week or so, put it in your attic/basement and just carry it out when you need it. It’s really not that much extra effort for a pretty significant impact.