By Todd Bernhard
Amazon is celebrating its 21st birthday with another "Amazon Prime Day" on July 12. Last year's Prime Day was more of a bust, as the type of deals offered were rarely impressive. I wrote recently that it seemed more like a garage sale as Amazon and its partners tried to unload oddball items at often unimpressive discounts. This year, Amazon has set guidelines for its vendors to make sure the items offered are valuable and the deals have certain minimum discounts.