People like to talk about themselves. If you can think of something to ask (the asking questions tip is a great one), even if you don't care what they will tell you, then they will take up a lot of the strain of the conversation. Even if you are not that interested in what they say, nod and smile and pay attention.
Things that might have been asked would be: Why they took the course, what other ones they are taking. Use observation - for example, if they had stickers or badges (pins) of a band, even if you don't know the band or any of their music, ask them what they thought about the last album and if they would recommend it. Have they been to see them play live? If there is nothing like that, maybe there is something happening on campus or some local event you could mention. Have a few of these things stored away in case you need them. British people are renouned for talking about the weather - it is a good, safe, non-controversial topic to talk to a stranger about. Find others like this that you can keep on standby so you won't always have to think on your feet.
People think I'm a great listener, but it's really because I don't have much of a clue what to say!! ! I let them talk, even if they are boring me, I don't zone out. It takes practice, a lot, cause we're not naturals at this stuff, but work at it and treat it like a little side project.
Oh, watch and listen to how other people do it - it's not a magic trick, though it can look like it sometimes.
Good luck!