A hint: if you change lenses hold the camera down so that dust etc dosn't fall in while changing lenses, it's easier to clean the lens than the mirrir of sensor!

Never clean your sensor with a blower or vaccum! Leave to the pros to clean them, if you scratch the sensor or blow/suck the sensor film off your in for a major repair! I know one person who wound up spending $1500 to have the sensor replaced because they scratched it....you think dust looks bad in a shot.

I get my camera cleaned twice a year (May & August (Ok, Canon takes care of the pros at certain events and those just happen to be the ones I cover where they clean gear). Hmmm, Nikon doesn't do that.....

JS