Shopping at dollar stores is an easy way to slash your grocery bills, but here are three things you need to check to get the best deals—and stay healthy. Check your smartphone! In addition to checking websites and apps for deals and coupons, use your phone to figure out which items are the best deals to stock up. It's not always easy to compare apples to apples—or eggs to eggs!—at dollar stores because package sizes are often a lot smaller—or larger than you'll find at grocer