Most religions are actually quite useful if you take the actual teachings of them and don't take them literally.

You don't have to be a religious person to benefit from religion.

For example, the concept of hell or heaven is basically having a worse or better life in the future, based on what you do in the present.

So, if you sacrifice in the present, you'll probably be better off in the future (heaven). If you indulge yourself in the present, you'll probably be worse off in the future (hell). This applies to anything, for example you don't eat that extra ice cream today and you end up in a healthy range weight (heaven). You don't buy crap and instead invest money now, so that you end up wealthier in the future (heaven), etc.