Cleaning Laptops

LCD cleaning:

Leave the notebook off, pick up some "Notebook LCD Cleaner" cloths at your local office supply store.

Or use the anti-static cleaner with tissues for the screen, but even a very soft cotton lint-free cloth will do fine.

Don't use water, window cleaners, or alcohol on an LCD.

Never spray a cleaner directly on the screen: always spray it on the cloth lightly instead before application.

Touchpad & Keyboard:

Use compressed air to blow out under the keyboard and around the touchpad.
Use the same anti-static cleaner on the cloth to wipe the touchpad and keyboard gently.

To clean the inside the case including the speaker grilles and fan exhaust ports, you should also use compressed air.
I recommend blowing out every open port and grille that you can find.
Then finally wipe the outer part of the grilles off with the cleaner and towel.