Clicking in the morning

Ok, I know this has probably been asked before, I looked for it and couldn't find it, so I guess I will just ask away. I have owned 3 honda's in my lifetime and all 3 would click before the car warmed up. It wasn't loud, just enough to where I could hear it when I turned the stereo off. After the car warmed up, no more clicking. What is making that clicking noise? Is there anything I can do to stop it from clicking?