Sometimes when you're trying to peer-pressure someone, reverse psychology is a good method to use; but it really depends on who it is you're trying to pressure. Here's an example of peer pressure using reverse psychology.
Victor: Kaily
Victom: Catherine
Dialogue:
Kaily: Catherine! There's a great party tonight and I'm going to go.
Catherine: What time is the party?
Kaily: Well, it starts at 10pm, but I don't want to go until 10:30.
Catherine: Your parents are letting you go?!
Kaily: No!
Catherine: *puzzeled* Then how are you goin?
Kaily: I'm just going to sneak out. I mean, after everyone's asleep and stuff, no one will hear me leave. So, are you going to come with me?
Catherine: I don't know. I don't think so. I mean, if my parents found out I would die.
Kaily: Oh! I get it! You're too scared. You're scared because you think that your parents will find out. Your parents aren't going to be there, but if you're scared, that's okay.
Catherine: No! You don't understand Kaily! I'm not scared--
Kaily: It's okay, Catherine, I know. If you weren't scared, you'd go to the party.
Catherine: *sigh* I'll go.
Kaily: Cool! Trust me, Catherine, you'll have lots of fun! You can dance and stuff, maybe you'll meet a guy or something!
That was pure peer-pressure! You have to do it in a nice kind of sneaky way. You can't be too blunt, like, "You're just scared that's why you won't go." Kaily told Catherine that she understood, Catherine felt a little more secure and a bit more comfortable, yet she was still being peer-pressured! Try it this way sometime!