The investment universe is filled with options for investors seeking dividend income. But since the goal of dividend investing is to boost your income and wealth significantly over the long haul, there are fewer viable investments than you'd think.

Costco Wholesale (NASDAQ: COST) and Domino's Pizza (NYSE: DPZ) are two dividend payers that investors owe to themselves to think about buying for their portfolios. Here's why.

If you're like most people, you're probably always looking to get the most bang for your buck. Few companies have seized upon this reality better than the membership-based retailer Costco Wholesale. Costco generates most of its profits from selling memberships. Because its massive buying leverage is used to buy product cheaply and in bulk from suppliers, the company often offers the best deals available on the market to its members.

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Source Fool.com