Macbook pro making clicking noise I'm not sure when it has been started to make clicking sounds randomly, but it has been bugging me a while. Any idea that what could be cause this problem? 

I'm using MAC OS X 10.8.2 and late 2009 13 inches macbook pro.
My guesses would be either the hard drive or the DVD drive. Your best bet is to have Apple take a look at it. You should make a genius bar appointment at the apple store nearest to you. Unfortunately if they find something wrong your machine is probably out of warranty, but at least you can get it diagnosed for free.