I assume you don't mean sensor cleaning Ken? I've yet to do mine anyway so you're out of luck.
Camera body:-
Externally all I've ever done is wipe it over with a dry cloth. With the plastic outer casing on modern cameras a damp cloth will remove any stubborn marks which can build up from handling. A little stiffish brush is good for removing dust from inaccessible places around nobs and buttons.
Body internally:-
Never ever touch the mirror with your fingers or anything else as they're often surface coated and you can remove or mar the finish permanently. Any slight dust you might be able to see on the mirror is probably best ignored because if you try to blow it off you're likely to dislodge it and get dust all over the focusing screen where it's highly visible, and whlst it doesn't appear on your pics, it's extremely annoying. I don't like using blower brushes in the camera at all for that reason. I have a little mini vac thing which runs off one AA battery, but I seldom use it to be honest. The best thing is prevention - don't leave the body without a cap or lens in place - ever, and don't lay it on it's back so dust can fall in.
Try to always store your gear in a bag or case and try not to store it up the corner on the carpet where all sorts of bugs and crawlies do dwell. I had a mite of some sort crawling around in my viewfinder for yonks once! Very distracting. If you've a cupboard which will house your gear - all the better, and try to keep your gear in a heated room you normally occupy so you avoid condensation when bringing it into the warm.
Lenses and Filters:-
Fingerprints are the big danger with lenses and filters as if left unattended they can chemically etch into the coating. All I've ever done in the main is a judicious dose of hot breath on the lens/filter surface and gently clean with a soft cloth. If you get a really stubborn mark then you can try a proprietory lens cleaner, but never apply it right onto the lens as you can strip the coating -always apply it to the cloth then the lens.