Monitors and LCD panels - clean with a mild cleaning solution like Windex and a soft cloth. Lie the LCD panel flat and lightly spray the cleaner so it does not drip into crevices and affect underlying components.

Keyboards - use a Q-tip to place a drop of cleaning solution on each key. Extreme care should be exercised so liquid does not dropped between the keys and onto the underlying keyboard's electronics. Let the solution stand for a few minutes, longer if the keys are very dirty. Clean with a soft cloth not a paper towel which can leave "fussies" between the keys. Use a vacuum or compressed are to remove dust and dirt from between keys.

Fans. - the grills should be kept free of dust to allow maximum cooling to the internal components. Use a vacuum or compressed air to remove debri.

CD-rom, DVD-rom, CD/DVD Combo drives and floppy disk drives - obtain commerical disk cleaning devices for these components. Always handle the media properly, e.g. keep in its case; hold media by the edges to eliminate finger prints (oil) on the surface; do not subject the media to extreme heat and cold; etc.