"in the footsteps of heaven, no one will ask you for your religion, just what you did on earth."
Singer Ustad Nusrat Fathe Ali Khan

Ask yourself, regardless of what your religion says, Did you do anything for anyone besides what you're responsible for.
Before you do anything, ask your self, after you do it or say it, will you still feel pure at heart? If not, then why do it?
Forget the fact that your religion is right and that you belive in someone that promises heaven, assume, that you will be asked, regardless of your religion, what did you do on earth. Is your reply worthy of an applaud and an entrance of a heavenly body?

Here is why you should do good selfless acts, if your Religion turns out to be the wrong one, your deeds can save you.

Three things every human should have. Food, Clothing, Shelter.
Make it a point once a month to provide the less fortunate.
Good deeds start at home, example 10 one dollar burgers to a home less a month cost only $10.