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Give the dog constant access to water. Change the water frequently. Consider a pet fountain. Add ice cubes on hot days. Make the water more exciting.
In a multistory home, put a bowl of water on each floor the dog has access to. If the dog spends part of the day outdoors or shut in a room, put an additional bowl of water in these locations. Try to keep these "water stations" in the same place so your dog knows where to look for water. A dog tied outside may get its chain or rope tangled, preventing it from accessing the water dish. If there is no alternative to tying it up, keep the area free from obstructions and place the water dish next to the stake. The water bowl may also get knocked over by the rope or chain, so check it often, replenishing the water as necessary. Empty the water bowl daily and rinse out any debris before refilling it, then wipe the sides with a paper towel. Change the water again whenever you notice hair or dirt floating in it, or whenever the water level is getting low. During hot weather, you may need to check the bowl every couple hours. Thoroughly wash and dry the water bowl at least once a week. If the bowl gets dirty, wash it more often. These bowl-sized fountains may be more attractive to dogs that prefer running water, or young puppies who aren't used to drinking from a bowl. These are also easier to find for dogs with vision problems. Many dogs prefer drinking cold water. Toss in a couple ice cubes. Do this while the dog is watching, and it may come over to investigate. If you don't want to buy a fountain, try shaking the bowl of water instead, or waving a toy over it. Dropping blueberries or other small treats in the water can also convince a dog to drink as it fishes them out. If the dog still isn't interested, try again after replacing the doggie bowl with an ordinary cup or bowl with a different shape or color.