"But if there's no hell, there are no consequences for our actions!"
I cannot count the number of times I have heard this argument or its variants. First off, there are consequences for your actions in this life: jail, pain, loss of property/reputation, and death to name but a few. There are plenty of reasons to be nice to other people without invoking the supernatural.
Nonetheless, many claim religion (well, not all of them- that would just be silly) as a source of morality. For a good rebuttal, see George Carlin's critique of the Ten Commandments. Our old friend Richard Dawkins also does a good job of demolishing the supernatural explanation for morality in this video. As for the other religions, if you're reading this, then you know how use the Internet, so find it yourself.
Here's my attempt at a new moral code:
1) Be nice other people. Not only is this prudent, but it also helps encourage nice behavior.
2) Do not let other people take advantage of you. Just being nice is not enough- you have to be on guard for not-nice-people.
3) Forgive people who wrong you, as everyone commits wrongs. Avoid holding grudges. Forgive people even if they do not ask for it.
A few months ago, I tried reading the Qu'ran. I read the first fourth and that is the reason I did not read the rest of it. I never thought I would read a book so bad that it makes Battlefield Earth look good but there is such a book. The fact that it is considered the most beautiful thing written in Arabic goes to show that the Arabs need some new books. I only hope no one translates Dianetics into Arabic. Then we'd have a billion Scientologists on our hands.
Here Arabs, try this: