TLDR; Purchase a camera cleaning kit.

Keeping the weekly tip short and simple.  If you have a camera that you can change lenses you should have a cleaning kit on hand before you need it.  You may be very careful when changing lenses, but dust will still get in the body of your camera.  I am not going to put a link for a cleaning kit because they come and go on Amazon quickly.  At the time of this writing, the price for most cleaning kits is around 15 dollars.  Just go to your favorite search engine or Amazon and search for "camera cleaning kit" and you will find a kit.