Dividend stocks are one of the best investments you can make. Companies that reward their shareholders with regular, growing payments can help to set you up for a comfortable retirement quickly.Yet not all dividend stocks are made equal. Sometimes company financials have deteriorated to the point where it has no business paying a dividend, or at least not as large as it has been.Even amongst Dividend Aristocrats and Dividend Kings, companies that have increased their payouts for 25 years and 50 years, respe ...