try to stanby or hibernate it when not using.....
and laptop monitor screen wont get burn that easily...
correct me if im wrong

I have never heard of screen scratches on LCD on normal daily usage unless you poke it or scratch the screen with something sharp. Dead pixel is unavoidable and it is due to the screen quality and luck.

I don't think so. If you poke the screen with a needle it will only cause a needle point size puncture on the outer layer of the screen. I don't think that is enough to cause a dead pixel. You might want to try and experiment it yourself. Let us know how it goes.