There are a couple of ways to remove water marks from wood. White toothpaste seems to have the best results. Simply rub it on with a cloth for a few minutes until you see results. See the full instructions and other methods here.
parmesan cheese containter lids will fit on mason jars! How about keeping baking soda by the sink for a mildly abrasive cleanser. Or flour near where you kneed your bread - just sprinkle on the counter.