No doubt that doing good to others brings happiness. So anything in this space that adds a smile to peoples' faces would probably work. Agree with others on pub

No doubt that doing good to others brings happiness. So anything in this space that adds a smile to peoples' faces would probably work. Agree with others on publishing addresses. Starting out in a small niche is a must before allowing others to join in. Who would I do personal favours for? Family & friends, poor folks (specially in developing countries or poor hoods), sick people, homeless individuals, and misfortunate ones...