As-Salamu Alaikum

"Feeding the hungry, and saying salaam to those you know and those you don't know."
(Bukhari and Muslim)

"When two Muslims meet (give salaam), and shake hands, they are forgiven their sins before they part (with each other)." (Abu Dawud)
"O people! spread salaam, feed the hungry, be in touch with your kin, and pray while people are asleep (at night) you shall enter paradise peacefully." (Tirmithi)
"The best of the two persons is the one who begins with salaam." (Related by Nawawi in his book Al-Adkar)