Smart Health Shop Forum Blog: Suggestions for starting out with bad knees?

I am looking for suggestions for a workout tape or routine I can get started getting back into shape for people who have issues with their knees. I've had pain and water on the knee for a while now. Lately, it has been increasing, but so has my weight. I have a feeling if I shed some pounds, then some of the discomfort would subside. But how do I get there like this? I've seen my doctor and was just told I have water on the knee and arthritis.

Thanks!