Greetings; How's it going? (somewhat informal) What's up? (informal) Sup? (very informal) How are you? How's life? (Very informal) You could also ask things like; How's your day been? How is your week going? How's the family? (a bit informal) Conversation starters; Got any plans this weekend? Where do you go to school? --> Do you play any sports? Are you in any clubs? How about that game last night? (Don't say this if you didn't actually watch the game) Did you hear about....? I like your *article of clothing*! Where'd you get it?