The 0.5 Second

Give a copy of Quran to someone and each time they read from it, you will gain hasanaat
Donate a wheel chair to a hospital and each time a sick person uses it, you will gain hasanaat
Share constructive reading material with someone
Help in educating a child
Teach someone to recite a dua. With each recitation, you will gain hasanaat
Share a dua or Quran CD
Participate in the building of a mosque
Place a water cooler in a public place
Plant a tree. Each time any person or an animal sits under its shade or eats from the tree, you will gain hasanaat
Share this with someone. If one person applies any of the above you will receive your hasanaat until the Day of Judgment