1) Give a copy of Qur'an to someone. Each time one reads from it, u gain.
2) Donate a wheelchair to a hospital. Each time sick person uses it, u gain.
3) Participate in building a Masjid.
4) Place water cooler in a public place.
5) Plant a tree. U gain whenever a person, animal sits in its shade or eats from it.
6) And the easiest of all, Sharing this message with people. Even if 1 applies any of the above, u gain.