Got a great beauty, personal care or household product—and want to see sold at Walmart? Well, tell the world’s largest retailer about it. Walmart has launched “Get on the Shelf,”a nationwide contest open to the mass in which the winners will get a chance have their product sold on Walmart.com and even in Walmart stores. Any product in any category currently covered by Walmart is eligible, according to the company. Contestants must create videos of their latest inventi...