Provide ample drinking water for your dog. You can position multiple bowls throughout your house in areas your dog frequents. This ensures your dog will always have somewhere to go for a drink. If it's available, your dog will drink it.
Add water to your dog's food. In addition to drinking water, you can add some to the food. It can be as much or as little as you deem appropriate. Your dog should not reject the meal because of the excess water -- it's a food-flavored liquid.
Water your lawn regularly. Be sure to observe any water restrictions in your neighborhood. A hydrated lawn acts as a shield to protect against the all-at-once nitrogen dump of a dog's urination. The extra water will help dilute the urine so it's less likely that yellow grass spots will appear.
Carry a filled water bottle with you and then dump its content on the spot where the dog urinated. This will help neutralize the urine's acidity and keep the grass healthy and green.