Some random truths that have popped in my head since I started this draft. Feel free to add more in the comments.
The person driving always chooses the music.
If I cook, you clean. If you cook, I clean. Whoever cooks should make an effort to limit the mess.
If you won’t put dishes in the dishwasher you can’t rearrange nor criticize the way someone else loaded the dishwasher.
A gas pump is not a parking spot. Get gas, move forward before going in to buy your stuff.
Hold doors for everyone. Men, women, young, old. And say thank you when someone holds the door for you.
Don’t ask for a favor if you are unwilling to give one in return.
You should always signal when changing lanes.
True friendship is like peeing your pants. Everyone can see it, but only you can feel the true warmth.
No TV comedy should ever have a laugh track.
Real leaders do more than they talk.
You find out who your real friends are when times are tough.
Love your neighbor. All your neighbors. You don’t get to choose the ones you love.
Love is a verb. It means action, not feelings.
If your religion gives you permission to hate, you are doing it wrong.
Again, add yours in the comments.