If you are not chronically strapped for money each month, consider adopting the practice of tithing — that is, giving one-tenth of your income to a worthy cause. Compute what one-tenth of your monthly income is and seriously consider whether you could live without it. If you find that you could live without it, then ask yourself, "What could I do with this money that would help people in greater need than I am?"

Tom Cowan in The Way of the Saints