Okay, so I tried to search these forums regarding caring for your macbook properly. I've read about Invisible Shield for macbooks, a thin plastic cover that is applied to the wrist guards, the top, the touchpad and the bottom. And thus protects the macbook from getting dirty/discoloured and perhaps even from fingerprints showing. (What I was looking at was this: http://www.shieldzone.com/item_description/APPMCBF.html ) I was also looking at some screen protectors (small filt thing to put on the keyboard before closing the lid), and various other things. But.. Is it really necessary? It looks promising and all, but.. How much is it needed? What do you people do to protect your MB's ?