i bought a cooskin keyboard cover to protect the keyboard, one of the clear TPU kinds. to clean the rest of the laptop i shut it down, remove the battery, then get about 2 or 3 paper towels, fold them up, wet them under the faucet, then squeeze about 80% of the water out (that way there's still a little moisture with it).

i wipe down the screen first, while the paper towels are still clean, i use a couple of dry ones, crumple them up (cleans glass and screen surfaces better like this), wipe down the screen, then clean the rest of the laptop.

i use the dry ones from wiping down the screen to dry it off. i usually wash the keyboard protector every other week in the sink with a dishsponge, some warm water, and dish soap.

about every few months i get a can of compressed air and blow it out real good, including my targus chill mat. with the way the newer g series are made with the dual exhaust and stuff, i'd probably try to find a way to blow into the exhaust and try to blow everything OUT. it really doesn't help to blow all that dust around if it's still staying inside the laptop.