Bite Bite Bite? No, no, no!
Chomp chomp chomp? Yes, yes, yes!
Don't, don't, don't bite your friends!
Don't, don't, don't bite your friends!
-Yo Gabba Gabba haahaa
If the dog jumps up and starts biting, knee it in the chest/stomach to make it stop. This does not hurt him, but teaches him dicipline. After using this tecnique, the dog should stop jumping and biting.
If the dog is biting you when you are sitting, the dog probably wants to play. Playing will most likely lead to biting. When she bites you, shout "ow!" and take the dogs snout in your hands and tell it "no!". Then get up and walk away. This will teach your dog that if she wants to play, she needs to play gently, espacially if you have children.
Choke collars will only make the dog afraid of you and collars, choke or regular. They can also cause damage to the neck area of the dog, especially puppies. Do NOT use chokers unless it is recommended by a veteranarian!
When the dog can play with you gently, reward him with treats. He will realize that playing nice pays well.