I may not be at all religious but still always do unto others as I would like to be treated. You don't have to believe in God to be a good person!
some would argue that you just believe in a god to be good. i don't get their argument. let's see: according to them it's better to be good because someone wrote down a bunch of rules for you so you wouldn't have to think for yourself, and if you're very good you get to live forever in a nice place, and if you're not you burn in a very bad place, than to be good because it's the human thing to do. it makes no sense to me!