I have a couple:
If you can lay your head down at night & go to sleep satisfied with how you lived that day without regrets, your job is done.
Treat others how you want to be treated (EVERYTHING comes full circle one day, I mean EVERYTHING)
Try to find at least one positive thing each day, we get so carried away with drama and bad things in life its easy to overlook something so simple as a sunset or the smell of something cooking..
If we can all take less for granted and be more humble, the world would be such a better place :)