Change your car’s oil often
Yes this is definitely something to keep on top of but don’t feel the need to do it too too often ex. Once a month assuming you drive a normal amount. Check the manual in your glove box and stick the recommended service interval. It should list miles driven and a length of time. Change it at which ever of those come first.
A set of keys that will open most of the doors in a certain national park. Turns out “government use only. Do not duplicate” doesn’t mean a whole lot to a crooked locksmith. My plan is to go test and see if they still work when I’m an old man. I won’t be surprised if they do