Summarize the following:
It essential that you train your dog a command for when you want him to stop doing something. "Stop" or "leave it" are common commands — whichever you choose, make sure that you are consistent and that everyone in the household uses the same command. When you see your dog doing the unwanted behavior, first give the command, then immediately follow with action (taking away the item or moving your dog away from it). By giving the command first, then doing the corrective action, you will give your dog the opportunity to do what you want when he hears you say "leave it" and avoid an unpleasant consequence. Puppies explore their environment by mouthing everything in sight. While these are natural behaviors for a puppy, you also don't want her to think it's okay to bite people or chew on your shoes. Your dog will not know what is appropriate for her to chew unless you teach her.  Keep anything you don't want your puppy to destroy up and out of her reach (this includes trash, books, shoes, remote controls, glasses, dirty underwear, etc.). Have plenty of toys for her to play with and chew on, but make sure they are not indistinguishable from household items (your dog will not know the difference between an old sock you offer her to play with and a new sock she is not supposed to chew). Allow your puppy to mouth you, so long as it is gentle. When your puppy gives you a hard bite, give a high-pitched yelp, as though she's really hurt you, and let your hand go limp (don't jerk it away). Your dog should stop biting, at which point you should praise her for stopping. If she bites you hard again, repeat these steps. Do this no more than three times in a 15-minute time period.  Give your dog a chew toy when she wants to chew on fingers. If you find your puppy chewing on something she shouldn't be, take it away and give her a toy to chew instead. As you take the item away, say “leave it” and give her a toy to chew on.  Do not punish your dog after the fact. If you find an item that your dog destroyed while you were away, don't wave it in her face while yelling at her. This won't teach her not to chew — she will not get the connection that you are angry about something she did two hours ago. Unless you catch her in the act, do not scold your dog. Most dogs can learn this command quickly with little trouble. Start out by observing your dog — when you see that he is in the process of sitting on his own, say "sit" clearly and in a firm voice. As soon as his butt touches the ground, praise him, pet him, and give him a treat. Do this every time you spy your dog about to sit.  Another method is to stand in front of your dog with a treat in your hand. Hold the treat centimeters above your dog's nose, then move the treat backwards, over his head, leading his nose. He should follow the treat with his nose and should sit down as he does this. Again, as soon as his butt hits the floor, give him the treat and praise him.  Once your dog has the motion down, say "sit" just before you begin to lead his nose back with the treat. Puppies jump to your attention or while playing. This may be cute when your Bernese is little, but they grow into huge dogs, and she may injure or scare people if she jumps when she is full grown. Teach her not to jump when she is a puppy to avoid problems later on. If your dog has already mastered "sit," this can make teaching her not to jump a lot easier. When she's in a situation in which she is likely to jump — meeting a new person, for instance, tell her instead to sit and reward her with your attention. When you see your dog is going to jump up on you, turn your body away, deflecting her, avoiding eye contact, and saying nothing. She will get the message that, when she jumps on you, she gets no reward or attention. Once she stops jumping and calms down, praise her with lots of petting, attention, and scratching. Once your Bernese knows how to sit, you can teach him the "down" command. Ask your dog to sit, then hold the treat in front of his nose. Lower the treat to the ground — he should follow with his nose, lowering his body; you can praise him as he moves toward the down position. When his belly touches the ground and he laying down, reward him with the treat and more praise. Once he is familiar with the movement, add the verbal command. "Down," "lay," or "drop" are common commands. Say it just before you begin bringing the treat down. Eventually, with practice, your dog will make the association between the action and the word "down." This can be a difficult command to train, as your dog will naturally want to follow you around. Teach this command to your dog once she has learned to sit and lay down. Begin teaching your dog to stay when she is calm (try after a walk), in a familiar environment, and with few distractions. Keep these sessions short at first, as it will be a challenge for her to stay in the beginning.  Stand in front of your dog and ask her to sit or lay down. If she remains in the position for a few seconds, quickly reward her with a treat. This signals that she is released from the position and may do something else. Repeat the process and wait a few seconds longer before rewarding your dog. If she breaks the stay before you have released her (by rewarding her with the treat), say "ah-ah!" And start over. Add the verbal command. When your dog is sitting or laying down, say "stay" and put one hand out like a stop sign. Wait a few seconds, then reward her with the treat. Gradually increase the length of the stay. Do this slowly, and don't make these training sessions too long or your dog may get frustrated. When your dog seems to be grasping stay, you'll need to complicate things a bit more. Because you want her to stay in position even when you are out of sight (if you ask her to sit and stay while you go in a store, for instance), begin taking a few steps back from your dog after commanding her to stay. If she breaks the stay, she does not get the treat. Some argue that this is not a necessary command — your dog should know that when you tell her to sit or stay, she should remain in that position until you release her. The stay command is an important command for your dog's safety — it can stop him from dashing into a busy street or another dangerous situation. Never let your dog off the leash outside (in an unfenced area) until he knows the "come" and "stay" commands and does them consistently. To practice this command, leash your dog and have some treats handy.  Holding the end of the leash, say "come" in a very welcoming voice, then quickly take a few steps backwards. Continue to back up until your dog reaches you. Reward him by saying "Yes!," then give him a treat. You can also practice this off-leash. Crouch or kneel and call your dog over to you throughout the day, rewarding him greatly when he comes to you. Never punish your dog when he comes to you. This could mean giving him a bath or shouting at him for not coming when you called, or even just ending his fun by snapping his leash back on every single time he obeys. Coming to you when you call needs to be the most appealing option your dog knows — more appealing than chasing that rabbit or running across the street to say hi to the neighbor.  Your dog must understand that he must come every single time you call him. When you are training, don't put him in a situation in which you know he won't obey you and then try the come command.

Summary:
Teach the dog to stop bad behavior. Train your dog to stop biting and chewing. Teach the dog to sit. Teach your dog to not jump on people. Train your dog to lay down. Teach your dog to stay. Teach the dog to come when called.