Peer pressure's never made me do anything I wasn't partially inclined towards anyway, but it can certainly be a factor in poor decision making; however, the way to combat this isn't (purely) better peers, but a more developed sense of self and identity, as well as assertiveness training (and, now that I think of it, possibly submissiveness (or... humility, perhaps, would be a better word) training, quite possibly allocating one or other of these on a Jungian Archetype basis).
What was my point? Oh yes, a developed sense of self. There aren't intrinsically good or bad choices, by an large, in a secular society, only choices which are good or bad for the individual, based upon their sense of self.