Six ways to earn even after death:
1. Plant a tree when every time someone sits there, you gain.
2. Give a copy of Qur'an, every time they read, you earn
3. Donate a wheelchair to a hospital. every time someone sick sits there, you gain.
4. Place a water cooler in a public space.
5. Participate in building a masjid.
6. And the easiest one - shard this message with other, when they read, you earn.