No but really. Just go up to him, intoduce yourself if you don't know him too well, and just make small talk, then possibly say something like "I think you're really cute" or something, and go from there.
Ah! I don't know, when I talk to guys I don't really put that much thought into it.
have you talked to him at all over the summer? cause i really liked my guy friend, and i hadnt talked to him in a while, and i just got up the courage to tell him and now we're going out. its a really long story and i'll only tell it if someone really wants to know. other than that, its just you basic, tell him how you feel, turns out he feels the same way!