The best thing you can use is the Monster Screen Clean which you can find at Circuit City, Best Buy, or HiFi Buys. You can also see it at Monstercable.com. It is the best and safest for lcd, crt, or big screens.
I use Kensington Screen Guardian, it's specially formulated for all types of LCD screens. You might also want to pick up the special lint-free clothes specially designed for Screen Guardian, but in my experience those are optional