Shakey Camera

First few times i've taken my still dig camera on the boat and all the vids get shakey from the bounce of the boat.

Wheres the best place to take vids from to prevent this? Any hints on ways to stop it like how to hold it?

What i do atm is look though the view finder because i think my arms absorb the bounce to much. I sit as close to the back of the boat as possible because its the front that does all the bouncing.

I was thinking of making a small tripod that i can attach to the back of the boat somewhere, and still have it swivel so i can pan with the rider.

Any hints on how to stop the bumpiness? All the vids i see that are posted don't experience this, but i thikn these are the video camera's, not still camera's pretending to be video cameras.