Whenever you meet another human being, man, woman or child, Muslim or Non-Muslim, just try to plant a tiny little seed of Islam in their hearts and minds.
Make sure it is Organic: meaning it is directly from the Qur'an and the Hadith and not a part of some ethnic or tribal culture.
Assalamu Alaikum! already starts you off on an autobahn whose speed or wonders you cannot even imagine, even though Muslims try to mess it up in every way they possibly can.
That simple start takes you to every wonderful place you want to go, whether it is worldly success, glory and achievement, or a cozy corner tucked away in a shady grove in Jannat, next to a dancing brook.
So, after Assalamu Alaikum! opens the door for you, try and plant that little seed in the mind of the person you just met. And watch Allah's wonders unfold.
For non-Muslims, find a nice equivalent to Assalamu Alaikum! in your own language.