[PaulF]

I gardened using raised beds for about ten years and the best thing for them was starting a compost pile and incorporating compost into the raised beds every year. Some may say just go ahead and add organic material directly to the beds, like your coffee grounds, but would compost everything first for a good mixture of greens and browns.

So far as rotation is concerned, a good mulching program and good sanitation will take care of a lot of that problem. A professional soil test every few years will let you know how the soil is doing and what nutrients need to be added.