You wouldn't think it but that's easier said than done for many people.
I know first hand. I run an ethics program at a large company and you couldn't imagine the number of folks that I would not have to deal with if they just kept "do the right thing" on their mind.
Recently I was having a philosophical discussion with a friend on this very subject. In our conversation I mentioned that I had come to the conclusion that the true meaning of life in this phenomenal world comes down to just that - doing the right thing.
I have also come to believe that you will continue to revisit these life lessons until you do get it right and make no mistake about it, eventually everyone will.