Buy a stick on glass protector. They are very good. Something like this
Larmor BY GGS Adhesive Optical Glass LCD Screen Protector FOR Nikon D3200 Camera | eBay
But shop around because there are lots to choose from at varying prices.
I second the GSS ones - I had one fitted to my D3100 and it was faultless.. In fact, I'm thinking of fitting one on my D7100 now....
Wow I had no idea they made an adhesive glass LCD screen protector for these. They seem like way better options than those clip on type plastic protectors I see on cameras sometimes. Thanks, I'll definitely be purchasing the GGS since it seems to be highly praised. 14 dollars is well worth protecting the screen.