"The immediate gratification of using plastic to buy an iMac, tickets to a Coldplay concert and nights of bar hopping has a way of coming back to haunt college students after graduation," The Wall Street Journal reports. "Despite their lack of a credit history and sizable student loans, most college students can get their hands on credit cards with as much ease as a swipe. And they're often lured into doing so with awards like free T-shirts. Along with the freebies, however, come some not-so-pleasant surprises: high interest rates and a range of fees and penalties. To graduate with honors in credit-card management, here's what students need to know."