For potassium I was on the very STRICT diet (as outlined and noted in Red's cookbook). My daily values were around 4,500-5,000 mg through the diet alone.
I charted my daily food intake online so I could make sure I was within the daily values for K, ca, Mg and Na.
I also supplemented with a nutritional yeast flake drink, and 2x per day a teaspoon of COT in water. In addition I took 2 or 3 capsules of 99 mg potassium citrate.