Warm welcome from the Pacific NW! I'd suggest investing in a rolling stool of some sort, I find mine very helpful. Another thing I've found helpful is to use one of those big kitchen or workroom poly-mats for weeding. Easier than the tiny little knee pad mats and gives more room for comfort. Sometimes when I'm feeling punky, I just lay my mat down and tell myself to just do 'that much' -- often that much turns into much more but it sure is a doable goal!