The findings of recent studies suggest that a multistrategy approach may reduce alcohol use and related problems among college students, although there currently are no specific recommendations on which combination of approaches is optimal. Recent studies also suggest that not all approaches are effective. For example, server and manager alcohol training programs by themselves are not likely to prevent illegal alcohol sales to underage college students. Social-norms campaigns are another example of an approach that should be used cautiously, because some campaigns appear to have iatrogenic effects (i.e., increased alcohol use).