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How often should you clean your equipment?
Since bacteria can start re-growing after a couple days, it may be a good idea to buy wipes to keep at your desk. A good schedule to follow would be to do a quick wipe every one to two days and a more detailed cleaning at least once a month.
CNET Video on how to clean your keyboard: http://howto.cnet.com/8301-11310_39-20092793-285/how-to-clean-and-disinfect-your-keyboard-and-mouse/
Sources: http://www.ehow.com/how_12005246_germs-off-laptop.html#ixzz21jyNtLOG, http://pcsupport.about.com/od/maintenance/ht/cleanflatscreen.htm, http://www.helpwithpcs.com/maintenance/mouse_problem_maintenance.htm