You need to be able to read, write, listen and speak. Just practice a lot :)

http://www.ielts-exam.net/

I mean, what's the score that the university you are applying for requires for the IELTS test?

Thank you ! But what do you mean by requirement ?

What's the requirement? Buy the official guide with simulations and watch useful videos.

I would recommend you this:

http://www.engvid.com/search/?q=ielts&x=0&y=0