What about scouting? Taking them out, to real nature and involving them in street preaching.
What about teaching them how "to know" impersonated people online, so they won´t be hurt when socializing on FB or those places i don´t visit?
What about teaching them develope their professional attitudes? So they can know what kind of a living they would like to live out, as a Christian?
Regarding matchmaking:
What kind of a person they would like to meet? and how they would know to crack what could be cracked before their hearts could be broken?