When dogs are bored, they can sometimes behave badly and somewhat destroy the environment you live in. Here’s how you can prevent your dog from getting bored and ruining your house.

[edit] Steps

Make sure your dog has lots of toys and things to play with. If your dog is still in his puppy stage and enjoys biting everything, make sure that you keep a close eye on him while he’s playing, and praise him whenever he plays with the toys, not your belongings (furniture, gardens, lawn, etc).
Take time out of your day to play with your dog. Playing fetch with your dog is great fun and helps him burn energy, and gives him exercise.
Take time to take your dog for a walk. This will benefit you and your dog because it's a fun activity and it's a great form of exercise. Take your dog to the park or the beach. At the beach, throw sticks for him into the water and let him retrieve them for you.
Training your dog will also keep him occupied, and give him the chance to become closer to you, and trust you as his owner. Teach him tricks as well as the basic commands (if it he still in his learning stage).
If your dog is allowed inside the house, simply allow him to be with you. This will create a strong bond between the two of you, and also allow him to trust you and stick with you when you need him, etc. Thing such as letting him sit by you or on your lap while you're watching TV, or letting him sit by you while you're doing paper/computer work or homework. Talk to him so he knows that you're not ignoring him.
When you're about to go, send her in your room with a chewy toy of hers, like a tennis ball, or newspaper to rip up (so that she does not rip up any thing else around her).
Put the t.v on so that she does not feel alone, and so that she has something to watch. A dog channel is the best idea, even Animal Planet is okay.
Take her to the grooming place, so that she sees dogs and gets to play around.
If nothing works above, then simply stay with her, cuddle watching lifetime, eating her and yours favorite snacks. There's no problem with taking a day off to have a some quality time with your best friend.

[edit] Tips

If your dog seems like she's whining or crying, like when she curls her flips into her mouth and whines. That's only because she wants attention or is talking to you. And even though you might not know what she's saying do it to her also. You know also whine to her.
If your dog growls when you knock on wood or something, she only trying to protect you. If you want to train her not to do that, simply say every time she does that NO, BAD.
If you have two dogs or more, they can be fine playing together because they have the company of other dogs. It is when dogs start to feel lonely, they will seek your company and become bored. If you only have one dog, you need to spend as much time with it as possible.
If your dog is teething, give him/her a chew toy.

[edit] Warnings

If your dog does spend too much time alone, he may behave in ways such as destroying belongings in your home, digging up the lawns or mess up your gardens. Let him know you care.
Never give a rawhide bone to your puppy, it is bad for their health.