I'm often asked about tithing and how much to give to charity and the obligation to contribute to society in some way, shape or form. My answer is really quite simply.
Until you are truly in a place of being ready to contribute something, whether it be money or a physical contribution don't do anything. Why? Because giving simply out of obligation creates more internal upset than relief.
I know there are tons of people out there who would chew my head off for this comment, but the bottom line, in my humble opinion, is we need to feel good about the contributions we make toward any cause we contribute to.
If your contribution is done out of fear or guilt, then you are not giving from the purity of your heart. There is no joy when contributing in this way. Everyone's circumstances are different and therefore not everyone will be ready to give back in ways that others say they should.
When you feel ready in your heart to contribute in a way that feels right for you, your contribution will have a much greater impact on both the giver and the receiver.