Out of all of the new products I've been using, Shaklee's Scour Off ($8.50) is the one that, hands down, I do not want to go without. Ever. I've used baking soda, Bon Ami, and Bartender's Friend on our white sink and countertops with good success, but these products take a lot of elbow grease. Scour Off is an entirely different animal. While it's nontoxic and uses natural abrasives, it's so much more effective than any of these other eco solutions. You barely have to scrub.
Plus, it smells great and you can use it with bare hands since it's so mild. It works on sinks, tubs, ceramic tile, shower doors, pots and pans, stainless steel, grout, and in dozens of other places around your home. I love this stuff.