Etienne,
My apartment is full of so much stuff now, I wouldn't know where to begin! But when I was in college, as long as I had the basic essentials + a house plant, I was happy. Me and my roomate were the typical BROKE college students so we didn't have much more than that. Now I'm 'older' (still young but in the next 'stage of life') so it's a little bit different.
Here's a website I think you might be interested in, it has some good tips:
http://www.digsmagazine.com
ZetaAce