Recruitment is an expensive business: In 2010-2011, the median cost to recruit an undergraduate was $2,185 among private colleges and universities, according to Noel-Levitz, an enrollment management consultancy. In these tough fiscal times, admissions departments are under pressure to keep those costs down even as they pursue higher enrollment and better-caliber students. To meet the challenges, schools are increasingly turning to tech solutions to give them a competitive edge. The author describes three tech tactics that are gaining traction on campuses: (1) mine data efficiently and use it; (2) harness the power of peers; and (3) offer an unforgettable campus tour.