Pay attention to how your dog likes to sleep and then buy a bed that supports its sleeping style. For example, if your dog usually curls up into a ball on the couch, buy a donut or bolster bed. If your dog likes to spread out on the couch, purchase a soft, cushion bed. Make sure that the bed is the right size for your dog. If you're uncertain or if your dog is between sizes, order a size up. It's better to get a bigger bed just in case, because smaller beds can lead to spine and neck problems Place your dog's bed on the floor in a quiet room (if the dog likes to be undisturbed when it sleeps) or in a corner of the living room (if the dog wants to be around the activity of the house). Put a few of the dog's toys near the bed to encourage the dog to use it. If your dog is disinterested in a dog bed or you don't want to buy one, pick a chair or piece of furniture that can be just for the dog. Don't let any other pets or people use the furniture. Your dog may be confused at first about why it can use one piece of furniture but not the couch. Be consistent in keeping the dog off of the couch and it will soon learn to stick with its own furniture. Do not try to section off a part of the couch for the dog. The dog may not understand why it is allowed on one part of the couch and not the other. The dog should have a completely separate piece of furniture. One of the simplest ways to teach the dog to use its bed or furniture is to set a dog treat on it. Do this several times throughout the day so your dog associates its bed with a positive experience. Eventually, your dog should come to prefer its furniture instead of the couch. You can also reward the dog with treats whenever you see it relaxing on its furniture. Start telling your dog to "go to bed" whenever you want it to use its own furniture or bed. At first, reward the dog whenever it touches or sits on its own bed. After a week or 2, start rewarding the dog only after it lies down on the bed for a certain amount of time. Soon, your dog will start to go to bed whenever you give it the command. Restrict your dog's access to the couch when you won't be around to keep it off. Put your dog in a crate or in a separate room in the evenings so it won't get into the habit of sleeping on the couch. Set out the dog bed or comfortable blankets so your dog won't miss sleeping on the couch.
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One-sentence summary -- Buy a comfortable pet bed for your dog. Make a place for your dog's bed. Designate a piece of furniture as the dog's. Use treats to encourage the dog to use its furniture. Teach your dog the "go to bed" command. Keep your dog in a crate or different room at night.

Use hot, clean water, making sure all the soap is gone. Soap left in the loofah could begin to smell. Put it in a place with good circulation so it can dry completely. Drying it out will prevent bacteria from forming inside the loofah. Store your loofah on a hook outside of the shower. Placing it near a vent or fan can also help it dry out quickly. Since many bathrooms stay humid, you might want to dry the loofah in a different room. You can run it through a hot wash cycle with your towels, run it through the dishwasher, microwave it for 30 seconds, or boil it in hot water for several minutes to kill any bacteria that might be growing. No matter what method you use, do it at least once a week to make sure the loofah stays healthy for use. Dermatologists have recently found that loofahs tend to harbor more bacteria than previously thought. That's why it's important to sanitize your loofah often. The same holds true for plastic bath poufs. Even though they aren't made from natural materials, they can still harbor bacteria. After this much time the loofah will be starting to fall apart from use and runs through the washer or boiling water. If you haven't been sanitizing your loofah, it's no longer safe for use after three weeks. Either way, time to get a new loofah. Many people have recently switched to using washcloths, since they're easier to run through the washer and they last much longer than loofahs. If you decide to stick with loofahs, make sure you dry them properly after each use and replace them frequently to keep your body healthy.
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One-sentence summary --
Rinse your loofah after each use. Dry the loofah completely between uses. Sanitize the loofah once a week. Replace your loofah every three weeks.