Downloaded the farseer physics engine from Codeplex. I played around with the demos provided. I copied the engine into my solution directory and added it into SVN. Then, I added it to my game solution.
I started looking through the way I've been doing things like creating new objects and collision detection and compared it to the way it could be done in farseer. It will take some re-factoring, but having a physics engine will take care of a lot of details for me, and will make modifying game-play elements much easier.